You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am William Carter.

ASSISTANT: How may I help you?

USER: I need to book a ticket with fare of 1000 from IAD to LAX.

ASSISTANT: May I know your travel dates?

USER: Could you please help me in doing that?

ASSISTANT: Sure.

USER: My travelling dates are 12/13 and return on 12/15.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1005. Shall I proceed with this flight?

USER: You can proceed with booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Most welcome.