You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I be of your help?

USER: I am John Jackson. I want to cancel my recent reservation due to some health issues, can you please help me with that?

ASSISTANT: Sure, I'll help you in cancellation. Please wait a moment I will check the reservation status.

USER: Sure.

ASSISTANT: Thank you for waiting. I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for opting us.