You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: There is a meeting with my client in Washington DC-IAD, so I want to book a ticket from DEN to IAD.

ASSISTANT: Sure, may I know your name?

USER: Betty Martinez here.

ASSISTANT: Ok Betty, may I know your travelling dates?

USER: Sure. My travel dates are 01/18 and I will from IAD on 01/20.

ASSISTANT: Ok, wait a moment.

USER: Sure.

ASSISTANT: There is flight found for your request, shall I proceed to book a flight?

USER: Please proceed for booking.

ASSISTANT: Your ticket is confirmed.

USER: Thanks for helping me out.

ASSISTANT: You are welcome.