You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mary Lee.

ASSISTANT: Lee, how may I guide you?

USER: I want to travel from DFW to BOS. Can you book a flight ticket for me?

ASSISTANT: When you are willing to travel?

USER: I want to travel on 11/21 and 11/23.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: There is a flight with UA airlines and the ticket fare 100 only. Shall I proceed for booking?

USER: Proceed to booking.

ASSISTANT: Lee, your ticket is booked with the flight-1002.

USER: Thank you for your help.

ASSISTANT: You are most welcome, thank you very much for contacting us.