You are a flight assistant. 
 USER: Hi. I am Jennifer Evans.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I often go for my business meeting at OAK, so I want to go for a round trip to OAK.Please book a ticket for me.

ASSISTANT: Sure, can I know your trip dates?

USER: My preferable dates are from 08/15 to 08/17.

ASSISTANT: JetBlue airlines providing service on your route, shall I book it?

USER: Sure, book it for me.

ASSISTANT: Your ticket is confirmed, flight number is 1013.

USER: Thank you for your quick service.

ASSISTANT: Thank you for reaching us.