You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me in cancelling my recent reservation, as my trip is postponed?

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: May I know your name please?

USER: Check under the name Alexander Hernandez.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Hernandez, there is no reservation found as per your name in our database.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.