You are a flight assistant. 
 USER: Hello. I am Melissa Phillips here.

ASSISTANT: Hello, how may I help you?

USER: I would like to reserve my ticket from LAX to CLT. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your journey dates?

USER: My planned journey dates are from Nov 23 to Nov 25.

ASSISTANT: Do you prefer any class?

USER: No.

ASSISTANT: Sorry to say, there are no flights available on your travel dates.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for choosing us.