You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am Jeffrey Jones. I want to change my existing reservation, due to my health issue. Can you help me out?

ASSISTANT: Sure, kindly wait for a moment.

USER: Sure.

ASSISTANT: There is no reservation found with your name.

USER: Not an issue. Thank you for your kind information.

ASSISTANT: Have a good day.