You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jonathan Martin here.

ASSISTANT: How may I help you today?

USER: Can you cancel my flight ticket reservation? As I am unable to make a trip to Chicago due to my health reasons, so please do cancel it.

ASSISTANT: Sure, I am here to help you with that.

USER: Ok.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there is no reservation found on your name.

USER: Ok, that is not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you.