You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to change my reservation due to health problem, can you help me?

ASSISTANT: Yes, I am here to help you. Let me know your name please.

USER: Myself George Edwards.

ASSISTANT: Edwards, please wait for a while. I will check your reservation status and get back to you.

USER: Ok.

ASSISTANT: Edwards, I have not found any reservation by your name in our database.

USER: No problem, thanks for checking.

ASSISTANT: You are most welcome and thank you for contacting us.