You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am William Smith, want to travel from SFO to DCA. Please help me in booking my ticket.

ASSISTANT: Sure, I'll help you with that. May I know your planned travel dates please?

USER: My travelling dates are from 05/03 to 05/05.

ASSISTANT: Ok Smith, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Spirit airlines is having a flight on that route with travel charge of 100, shall I proceed for booking?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket has been booked with flight-1017, have a safe journey.

USER: Thank you.

ASSISTANT: Thank you for choosing us.