
| E                                                                       | Hi ELVIS here I ve got your mail                                             | MI Top            |
|-------------------------------------------------------------------------|------------------------------------------------------------------------------|-------------------|
| Read me my messages from Kim                                            |                                                                              |                   |
| U                                                                       |                                                                              |                   |
| E                                                                       | In the messages from Kim  there s   message about  Interviewing              | Read First   RF   |
| Antonio" and message about Meeting Today" The first message is          |                                                                              |                   |
| titled Interviewing Antonio " It says I d like to interview him I could |                                                                              |                   |
| also go along to lunch  Kim "                                           |                                                                              |                   |
| U                                                                       | User says nothing within 5 seconds so the system takes the initiative        |                   |
| You can say repeat to repeat the last message or you can say next       | Read Timeout                                                                 |                   |
| E                                                                       |                                                                              |                   |
| to read the next message in this folder  You can say I m done here to   |                                                                              |                   |
| exit this folder                                                        |                                                                              |                   |
| U                                                                       | Next message                                                                 |                   |
| E                                                                       | This is a message about meeting today  It says the meeting this  ReadMessage |                   |
| morning is at                                                           | win d                                                                        | See you there Kim |
| U                                                                       | I m done here                                                                |                   |

| Summarize Strategy                                          | Example Prompt                                  |               |
|-------------------------------------------------------------|-------------------------------------------------|---------------|
| Summarize Both  SB                                          | In your top level inbox from Kim there s        | message about |
| Lunch "  From  Michael   there s                            | message about                                   | Evaluation    |
| group meeting" From Noah  there s   message about  Call Me  |                                                 |               |
| Tomorrow" and message about Interviewing Antonio" And       |                                                 |               |
| from Owen theres message about Agent Personality "          |                                                 |               |
| Summarize System SS                                         | In your top level inbox theres message from Kim | messages      |
| from Noah    message from Michael  and   message from  Owen |                                                 |               |
| Summarize Choice Prompt                                     | E Summarize by subject by sender or both        |               |
| SCP                                                         | U Subject                                       |               |
| E In your top level inbox theres message about Lunch "      |                                                 |               |
| message about  Interviewing Antonio "                       | message about   Call                            |               |
| message about Evaluation Group Meeting "                    |                                                 |               |
| "Me Tomorrow "                                              |                                                 |               |
| and                                                         | message about   Agent Personality"              |               |

Mixed Initiative  MI  Dialogue Strategy  ELVIS leaves it up to the user to take the initiative  unless the user seems to be having trouble with the system Figure Alternate Summarization Strategies in response to a request to  Summarize my messages" A different type of strategy choice involves ELVIS s decisions about how to present infor mation to the user  We mentioned above that there are many different ways to summarize a set of items that the user wants information about  ELVIS explores the set of alternate sum t marization strategies illustrated in Figure   
these strategies vary the message attributes that are included in a summary of the messages in the current folder   The Summarize Both strategy  SB  uses both the sender and the subject attributes in the summary  When em ploying the Summarize System strategy  SS   ELVIS summarizes by subject or by sender based on the current context  For instance  if the user is in the top level inbox  ELVIS will summarize by sender  but if the user is situated in a folder containing messages from a par Figure