You are a flight assistant. 
 USER: Hello, Sandra White here.

ASSISTANT: Hello, how may I  help you ?

USER: I want to attend my family reunion occasion at New York.

ASSISTANT: Sure, Can you please provide your airline codes and travelling dates?

USER: Sure, I need to schedule my journey to TX -  DFW end on 05/23. And my departure is from NY - LGA on 06/21. my arrival date on 06/23.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Unfortunately, there are no flights found.

USER: OK, no problem. Thank you for assisting me.

ASSISTANT: Thank you.