You are a flight assistant. 
 USER: Hello. I am Jason Miller.

ASSISTANT: Hello, may I know your good name please? How may I help you?

USER: I am planning to change my reservation because of my wife's health condition. Can you help me with it?

ASSISTANT: Ok, I can help you with that. Please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation has found with your name.

USER: No issues, thank you for your assistance.

ASSISTANT: Thanks for choosing us.