You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself George Adams. I want to change my reservation due to my health is not good.

ASSISTANT: Sure Adams, please wait for a minute.

USER: Sure take your own time.

ASSISTANT: Adams, there is no reservation found with your details.

USER: Thank you for helping me.

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