DIAL FOR ME   ^   dtmf flag
^^ recog contains "from" if sys label
^ recog numwords ≤     t he n  rpartial-match if  sys label    DIAL FOR ME  A  dtmf flag        A  asr duration >
^ recog grammar
" Billmethod gram  ∧  recog contains "my"   ∧  recog numwords ≤
then rpartsal-match if spoken digit
^ salpertime <
if spoken digit A salpertime ≤
then rmismatch if spoken digit
^ top confidence <
t hen rmismatch if spoken digit A salpertime <
match if  asr duration ≥
t hen rmismatch v Figure A subset of rules learned by ripper when given the automatic features for deter mining auto-SLU-success

| Class           | Recall   | Precision   |
|-----------------|----------|-------------|
| R CORRECT       |          |             |
| NO-RECOG        |          |             |
| RMI SMATCH      |          |             |
| RPARTIAL- MATCH |          |             |

Ta ble Precision and Recall for Test set using Automatic features CORRECT This resulted in a recognition accuracy of the same time improvement over the baseline of          which is the percentage of RINCORRECT exchanges  The precision and recall matrix is given in Table

| R CORRRECT      | NO-RECOG   | RMI SMAT CH   | RP ARTIAL   |
|-----------------|------------|---------------|-------------|
| R CORRECT       |            |               |             |
| NO-RECOG        |            |               |             |
| RMI SMATCH      |            |               |             |
| RPARTIAL- MATCH |            |               |             |

Confusion Matrix for Test set using Automatic features Ta ble