You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Larry Lopez. I am planning to book a ticket to attend a meeting at EWR. Can you please help me out to book a ticket from IAD?

ASSISTANT: Sure, can you please provide me with your dates of journey?

USER: I would like to travel on 09/09 and return back on 09/11.

ASSISTANT: Ok, please wait for a mean while to check for the availability.

USER: Sure.

ASSISTANT: There is a flight with the connecting flight of fare 100 and the airline is Spirit, shall I book this ticket?

USER: That's fine, please proceed the booking.

ASSISTANT: Ok, your booking is done with the flight number 1011.

USER: Thank you for your service.

ASSISTANT: You are welcome, have a happy journey.