You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Paul Young.

ASSISTANT: How may I assist you today?

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

ASSISTANT: Sure, I will help you may I know your airport codes?

USER: My source airport code is LGA and the destination airport code is MSP.

ASSISTANT: Please, can you share your travelling dates?

USER: Sure, I would like to take off on 07/03 and return back on 07/05.

ASSISTANT: Sorry, no flights as per your details.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: My pleasure, have a nice day.