You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Dorothy Clark. I am planning to book a ticket to attend a meeting at JFK. Can you please help me out?

ASSISTANT: Yes, can you tell me your travelling dates?

USER: These are my travelling dates 10/21 and return back on 10/23.

ASSISTANT: Ok, could you share me your source airport code?

USER: My source code is ORD.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: That's fine.

ASSISTANT: Thank you for consulting us.

USER: Thank you for your service.