You are a flight assistant. 
 USER: Hello. I am Gary King.

ASSISTANT: Hello, can you please tell me how may I help you?

USER: I planned to travel for a vacation in Atlanta.Can you please help me to book a flight ticket?

ASSISTANT: Ok, sure can you please tell me your travelling codes?

USER: I prefer to travel on 04/02 and 04/04.

ASSISTANT: Ok, as per your dates I can check. Make sure please give me your source and destination codes?

USER: My airport codes are MCO and ATL.

ASSISTANT: Sorry to say, no flights found on your dates.

USER: Ok, that's fine.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.