You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking the flight ticket from SFO to LGA?

ASSISTANT: Sure, may I know your trip dates?

USER: My travel dates are Feb 11 and Feb 13.

ASSISTANT: Do you have any other requirements?

USER: Yes, I need a single connection flight.

ASSISTANT: Can I know your name?

USER: Deborah Martin.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: Not an issue, thank you for the information.

ASSISTANT: Most welcome.