You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to buy a flight ticket from the locations CLT to LAX. Can you please help me?

ASSISTANT: Sure, please share your travel dates.

USER: Ok, my travel dates are 12/15 and 12/17.

ASSISTANT: Can I know the name for booking he ticket?

USER: My name is Charles Rodriguez.

ASSISTANT: Sorry Charles, there is no flight available on your requested dates.

USER: It's ok, thank's a lot for searching.

ASSISTANT: You are welcome.