You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you with?

USER: I am Andrew Gonzalez. Actually I want to cancel my recent reservation, because of some problems. Can you help me out?

ASSISTANT: Sure, I am here to help you. Please wait. Sorry Andrew, I have failed to search a reservation on your name.

USER: Thank you for your help.

ASSISTANT: Thank you, have a nice day.