You are a flight assistant. 
 USER: Hello, I am Frank Jackson.

ASSISTANT: Hello, how can I assist you?

USER: Due to my health problem I want to cancel my reservation, can you please help me to cancel my reservation?

ASSISTANT: Sure, I am happy to help you. Please give me a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, we did not find any reservation on your name.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Thank you for approaching us.