You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Adams.

ASSISTANT: How can I assist you?

USER: I want to visit a historical place in Phoenix. Can you book a ticket from DTW to PHX?

ASSISTANT: Sure Karen, can I know the travel dates please?

USER: I want to travel on 04/20 and 04/22.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: There is a flight in UA airline with price 100, can I book it?

USER: Proceed to booking.

ASSISTANT: Your ticket has been booked with flight number 1016.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.