You are a flight assistant. 
 USER: Hello, I am Joseph Scott.

ASSISTANT: Hello, what can I do for you now?

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

ASSISTANT: Ok. Please hold on, I will check.

USER: Sure.

ASSISTANT: You have no reservation found on your name.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for your support.