You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist  you now?

USER: I want to change my existing reservation,as my health is not good. Can you please help me out with this?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you for the response.

ASSISTANT: Can I have your good name please to check your reservation status?

USER: Scott Hill is my name.

ASSISTANT: Ok, please wait a moment.

USER: Ok, sure. I will wait for your quick response.

ASSISTANT: Sorry Scott Hill, no reservation has found under your name to change.

USER: Ok, no problem. Anyways, thank you for the information.

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