You are a flight assistant. 
 USER: Hello. I am Robert Taylor.

ASSISTANT: Hello, how can I serve you?

USER: As I am suffering from fever since from last night, so I can't travel. Please, cancel my reservation.

ASSISTANT: Sure, please wait a moment I will check and let you know.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, we did not found any reservation on your name. Thank you for reaching us.

USER: Thanks for information.