You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please book the ticket from IAD to JFK? As I need to attend an interview.

ASSISTANT: Sure, we are here to help you. Can you please share your travel dates?

USER: Sure, I would like to depart from my source location on 20th Feb and I want to return back by 22nd Feb.

ASSISTANT: Do you have any connection limit?

USER: I don't have any other specifications.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: Please share your name.

USER: My name is James Robinson.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thanks for reaching us.