You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my recent reservation, due to an health issue. Can you help me?

ASSISTANT: Sure, I am here to help you. Can I have your name to check your ticket status?

USER: Sure, I am Christopher Lopez.

ASSISTANT: Ok, please give me a minute.

USER: Ok.

ASSISTANT: Sorry for the trouble, there is no active reservation found with your name in our system data to cancel.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are most welcome.