You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to travel MCO to attend my friend wedding.Can you help me to book my flight ticket?

ASSISTANT: Can I know your travel dates?

USER: My travelling dates are 05/28 and 05/30.

ASSISTANT: Can I know your source airport codes?

USER: My source is LAX.

ASSISTANT: Can I know your name?

USER: I am George Johnson.

ASSISTANT: Sorry Johnson, there are no flights available on your request.

USER: Ok, it's fine. Thank you for the information.

ASSISTANT: Thank you, have a good day.