You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I want to fly from DFW to JFK. Can you check the flight availability on that route?

ASSISTANT: Sure, can I know your trip dates?

USER: My planned travel dates are 12/28 and 12/30.

ASSISTANT: Do you prefer a connecting flight?

USER: I want a flight with single connection.

ASSISTANT: May I know your class preferences?

USER: No more specifications please.

ASSISTANT: May I know your name?

USER: Sure, Gary Allen here.

ASSISTANT: Sorry, there are no flights available on your request.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us.