You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I would like to fly on the dates of 12/07 to 12/09, so help me in finding a best flight.

ASSISTANT: Sure, may I know your journey airport codes?

USER: My locations are IAD - DFW.

ASSISTANT: Do you need a connection in between your journey?

USER: Yes, I need it.

ASSISTANT: Let me know your name please.

USER: My name is James Martin.

ASSISTANT: How much can you afford for the flight ticket?

USER: I can afford up to 200.

ASSISTANT: Thank you for sharing your details. There are no flights found according to your requirements.

USER: No worries, I will choose another alternative to go. Thank you for your support.

ASSISTANT: Thank you for choosing us.