You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I have to go CLT for my film shooting purpose, can you please book a flight ticket from LAX?

ASSISTANT: Sure, I will help you with that.

USER: Thanks.

ASSISTANT: Can I have your travel dates please?

USER: My departure date is 03/27 and please book my return ticket also on 03/29.

ASSISTANT: Please wait a moment and I will check for flight availability.

USER: Sure.

ASSISTANT: Sorry to inform you that no flight is available to you.

USER: Oh! It's ok no problem, I will go with another airline.

ASSISTANT: May I know your good name for documentation purpose?

USER: Sure, my name is Gregory Evans.

ASSISTANT: Ok, thank you for choosing us.

USER: Thank you for your information.

ASSISTANT: Welcome.