You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I need to cancel my reservation as I am not feeling well. Can you help me with that?

ASSISTANT: Sure, I will help you with that.

USER: Thanks for your concern.

ASSISTANT: Let me know your name to check your reservation?

USER: Sure, my name is Timothy Clark.

ASSISTANT: Ok, please wait a moment.

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: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for chosing us.