You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Jeffrey Moore. I am planning to cancel my recent reservation, due to health issue. Can you please change my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Wait for some time I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: That's fine, thank you for your service.

ASSISTANT: Thanks for approaching us.