You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight ticket. Can you please help me?

ASSISTANT: Sure, could you please share your journey dates?

USER: I want to start on 09/07 and return back on 09/09.

ASSISTANT: May I know your airport codes?

USER: My airport codes are IAD and BOS.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: There is a UA airlines flight available for you, shall I Proceed?

USER: Ok, please proceed with booking under my name Justin Williams.

ASSISTANT: Ok, your booking is done.

USER: Thank you for booking.

ASSISTANT: Welcome.