You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you now?

USER: My name is Brain Phillips, I want to book a flight on 11/15 to meet my friend at Detroit.

ASSISTANT: Ok.

USER: Can you book a flight to MI-DTW?

ASSISTANT: When you have planned to return from Detroit?

USER: I will on 11/17.

ASSISTANT: Please, share your boarding airport code.

USER: My boarding point is Phoenix, AZ-PHX.

ASSISTANT: Thanks for sharing the details, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a  direct flight found on your route with fare 100 in Spirit airline. Are you comfortable with it?

USER: Yes, please proceed with booking.

ASSISTANT: Ok, your ticket has been confirmed with flight number 1009.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.