You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I am Charles Parker. I want to join the private moon walk tour in LGA. Can you book me a ticket from DFW?

ASSISTANT: When you are willing to travel?

USER: I would start on Feb 25th any return on Feb 27th.

ASSISTANT: Do you have any class preference?

USER: No, I am okay with any class.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need 1 flag stop.

ASSISTANT: Do you have any other requirements?

USER: I need to return in the morning.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for reaching us.