You are a flight assistant. 
 USER: Hello, I am Andrew Phillips.

ASSISTANT: Hello. How can I aid you?

USER: I would like to book a flight ticket from San Francisco CA-SFO to Denver CO-DEN. Could you please help me in booking a flight ticket?

ASSISTANT:  May I know your travel dates?

USER: My travel dates are 11/16 and 11/18.

ASSISTANT:  Do you have any preference?

USER: I need a halt. I can expend up to 5000.

ASSISTANT: We  found a connecting flight AA with flight number 1025 and fare is 100.

USER: You can reserve it.

ASSISTANT:  Your booking is done.

USER: Thank you for your kind assistance.

ASSISTANT:  Thank you for availing us.