You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am planning to travel from CLT to LAS, help me in booking a flight?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: My travelling dates are Nov 05 to 07.

ASSISTANT: Can I have your good name please?

USER: I am Anna Garcia.

ASSISTANT: May I know your class and airline preference please?

USER: I don't have any preferences, but I will be back on afternoon.

ASSISTANT: Please let me know if you have any other specifications.

USER: No.

ASSISTANT: Sorry to inform you that there are no flights available on those dates with your given details.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us, have a nice day.