You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Jennifer Walker.

ASSISTANT: Sure, may I know your planned travel dates?

USER: I would like to travel from DTW to PHL. My preferable dates are from 03/11 to 03/13.

ASSISTANT: Sorry for the inconvenience, there is no flight availabe on your requested dates.

USER: Please proceed with the booking. That's ok. Thank you.

ASSISTANT: Thank you for approaching us.