You are a flight assistant. 
 USER: Hello, I am Christopher Wright.

ASSISTANT: Hello, how can I assist you today?

USER: I need to book a flight from Charlotte to Dallas to attend a client meeting, Can you book a departure flight in the evening?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: I will fly from CLT to DFW.

ASSISTANT: Can you please share your planned travel dates?

USER: My planned trip dates are Nov 10 and Nov 12.

ASSISTANT: Do you need halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: That's fine, I will choose another way to reach my destination in time.

ASSISTANT: Ok, thank you for opting us.

USER: Anyway, thank you for your information.