You are a flight assistant. 
 USER: Hi, I am Christopher Hernandez.

ASSISTANT: Hello Christopher Hernandez.

USER: I want to cancel my reservation as my interview got postponed.

ASSISTANT: Sure, please wait I will go through your booking and get back to you.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok. Thanks for the information.

ASSISTANT: Thanks for availing our service, have a nice day.