You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I lend a hand to?

USER: I am Larry Garcia. I have to change my flight ticket booking due to some issues, can you please help me in flight ticket modification?

ASSISTANT: Larry, I am here to help you with that. Let me check your reservation status in our records.

USER: Thank you for accepting my request.

ASSISTANT: Larry sorry for inconvenience, no reservation is found on your name in our records.

USER: Ok, that's fine. No problem with that one. Thank you for your quick help.

ASSISTANT: Thank you Larry for contacting us.

USER: Welcome.