You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Richard Martin.

ASSISTANT: How can I aid you today?

USER: I planned to meet my cousin in LAS, can you please help me to book a flight ticket from CLT?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I prefer to travel on Dec 27 and Dec 29.

ASSISTANT: Do you have any price limit?

USER: I can afford 5000.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you for visiting us.

USER: Thank you for your information.