You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Anna Thomas.

ASSISTANT: How can I help you today?

USER: I am planning to attend convocation meeting at Orlando, can you please help me with booking a flight ticket?

ASSISTANT: Anna Thomas, may I know your airport codes for this journey?

USER: My source airport code is ATL and the destination airport code is MCO.

ASSISTANT: What are your planned dates for this trip?

USER: Sure, I would like to take off on 11/28 and return back on 11/30.

ASSISTANT: Sorry to inform you Anna Thomas, there are no flights available on your required dates.

USER: Ok, no issues. I will try another alternate way to complete my trip. Anyways, thank you for checking.

ASSISTANT: Thank you for choosing our agency. Have a nice day.

USER: You are welcome.