You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: Please book a ticket from Atlanta, GA-ATL to Philadelphia, PA-PHL.

ASSISTANT: When are you planning to travel?

USER: Departure is by 05/06 and 05/08 is return date.

ASSISTANT: May I know your good name?

USER: I am Shirley White.

ASSISTANT: Sorry, we found no flights on your date.

USER: Thanks.

ASSISTANT: Thank you for choosing us.