You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am Christopher Lee. I want to book a flight ticket from JFK to DTW. Can you find a flight ticket for me?

ASSISTANT: Sure, please share me your trip dates.

USER: Sure, I am planning to travel on these days that is on Feb 11 and return on Feb 13.

ASSISTANT: Do you need any preferences?

USER: Yes, I need a single connecting flight.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, not an problem.

ASSISTANT: Thank you for opting us.

USER: Thank you for your information.