You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Jason Martinez here. I would like to change my reservation due to some health issues, can you please help me with that?

ASSISTANT: Sure Jason Martinez, I will help you with that. Please wait a moment to check your reservation status.

USER: Ok.

ASSISTANT: Sorry Jason Martinez, no reservation has found under your name to change.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.