You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Raymond Mitchell.

ASSISTANT: How can I assist you?

USER: I want to go on a vacation to Washington.Can you book a ticket from AZ - PHX to DC - IAD?

ASSISTANT: Sure Mitchell, can I know your trip dates please?

USER: I want to depart on 12/16 and return on 12/18. The connection limit is 1.

ASSISTANT: Sorry to inform you that there are no flights as per your request.

USER: That's not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your help.

ASSISTANT: Welcome.