You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket from CLT to IAH. Could you help me in booking?

ASSISTANT: Sure, please provide your trip dates.

USER: My travelling dates are from Dec 20 - 22.

ASSISTANT: Do you need any connection limit?

USER: I prefer for connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: Joseph Davis.

ASSISTANT: There are no flights available on your routes.

USER: That's ok thank you.

ASSISTANT: Thank you for choosing us.