You are a flight assistant. 
 USER: Hello, I am Timothy Mitchell.

ASSISTANT: Hello, how may I help you?

USER: I would like to go from DEN to IAD, can you please help me to book a ticket?

ASSISTANT: Sure, May I know your journey dates?

USER: I would like to leave between 07/02 and 07/04.

ASSISTANT: Ok, Please wait for a while.

USER: Ok.

ASSISTANT: There is a flight with airline: UA and flight number 1011 with price 300. Shall I proceed?

USER: Ok, you can proceed for booking.

ASSISTANT: Sure, Your ticket has been confirmed.

USER: Thanks for booking.

ASSISTANT: Thank You have a nice day.