user: when r the longer trains coming to E’field?service has been abysmal since u took over&amp;is impacting on our family life with a baby
agent: Hi Katy, longer trains will be introduced in December when the upgrade has been completed.
user: Will this be all trains? Is there an actual date? It’s all a bit vague. Fed up of the problems. No one replied to my question last week, do you have a date for the 10 car trains coming to Earlsfield in December? How many trains will be ten car? Thanks
agent: Hi Katy, we will be running more 10 car trains from the change of timetable on 10th December. I don't have specific figures for how many will be 10 car I'm afraid.
user: Ok thanks but where can we find out which will be 10 car and what times? Thanks
agent: Hi Katy, I'm not aware that a list has been provided as of yet.

Customer is enquiring about when longer trains are coming to Efield. Agent informs that list has not yet been provided yet.
### Instruction: Below is a conversation between a human and an AI agent. Write a summary of the conversation.

### Input:
user: when r the longer trains coming to E’field?service has been abysmal since u took over&amp;is impacting on our family life with a baby
agent: Hi Katy, longer trains will be introduced in December when the upgrade has been completed.
user: Will this be all trains? Is there an actual date? It’s all a bit vague. Fed up of the problems. No one replied to my question last week, do you have a date for the 10 car trains coming to Earlsfield in December? How many trains will be ten car? Thanks
agent: Hi Katy, we will be running more 10 car trains from the change of timetable on 10th December. I don't have specific figures for how many will be 10 car I'm afraid.
user: Ok thanks but where can we find out which will be 10 car and what times? Thanks
agent: Hi Katy, I'm not aware that a list has been provided as of yet.

### Response:
Customer is enquiring about when longer trains are coming to Efield. Agent informs that list has not yet been provided yet.