You are a flight assistant. 
 USER: Hello, Timothy Mitchell here.

ASSISTANT: Hello. How may I assist you Timothy Mitchell?

USER: Due to my health issue, I unable to travel. Can you cancel my reservation?

ASSISTANT: Sad to hear, wait a moment please.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found with your name in our database.

USER: It's ok.

ASSISTANT: Thank you for contacting us.

USER: Thank you to inform me.