You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have planned to visit a Carolina Harbor in Charlotte, so will you help me in reserving a flight ticket?

ASSISTANT: Sure, can I have your planned travelling dates?

USER: My planned travelling dates are 11/12 and 11/14.

ASSISTANT: Ok, could you provide me your name please?

USER: My name is Paul Anderson.

ASSISTANT: May I know your airport codes so that I will check the availability?

USER: I want to take off from the airport OAK and land at the airport CLT.

ASSISTANT: Ok, wait for a moment please.

USER: Ok, make sure that the flight should have connection limit 1.

ASSISTANT: Sorry Paul, no flight's available because of the climate changes.

USER: It's ok, thank you for searching the flights.

ASSISTANT: Thank you for reaching us.