You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dennis Lee, want to book my round trip ticket from SFO. Please help me.

ASSISTANT: Sure, may I know your travelling dates please.

USER: My travelling dates are from 03/31 to 04/02.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Delta airlines is available in your route with the ticket fare of 100, shall I proceed with the booking?

USER: Please proceed.

ASSISTANT: Your ticket is booked with the flight-1008.

USER: Thank you.

ASSISTANT: Thank you for reaching us.