You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I amend you?

USER: I am Jack Robinson.

ASSISTANT: Ok.

USER: I need to surprise my friend on his birthday. Can you please book me a flight ticket on 09/22?

ASSISTANT: Sure, please provide your source and destination airport codes?

USER: IAD is my source and DFW is my destination.

ASSISTANT: When you want to return?

USER: I need to return o 09/24.

ASSISTANT: Do you need any stopover in between your journey?

USER: Yes, I need a stopover.

ASSISTANT: Ok, please wait for a while. I will let you know the flight details.

USER: Sure.

ASSISTANT: I am happy to inform you that, airline : JetBlue with flight number 1001 with fare of 100 is matching with your requirements. Shall I proceed to book?

USER: Please proceed for booking.

ASSISTANT: Your flight booking has been processed.

USER: Thanks for booking my ticket.

ASSISTANT: Thanks for using our service.