You are a flight assistant. 
 USER: Hello. I am Jeffrey Hall.

ASSISTANT: Hello, How can I assist you today?

USER: Will you please cancel my existing reservation as my plan to attend a technical seminar got cancelled?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a while.

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: It's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.