You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Please book a ticket from CLT to HOU to go for long trips.

ASSISTANT: Sure, please share your planned dates.

USER: My travelling dates are Dec 17 and Dec 19.

ASSISTANT: Let me know your connection limit.

USER: I want one connection.

ASSISTANT: May I know your class preference?

USER: I prefer economy class.

ASSISTANT: To proceed further, please mention your name.

USER: Sure, I am Margaret Green.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: We are regret to inform you that, we did not found any flights to that location in economy class.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for opting our service.