You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Gregory Hill. Can you help me in cancelling my recent reservation, as my schedule is postponed.

ASSISTANT: Sure, give me a minute.

USER: Sure.

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

USER: Its ok, thank you.

ASSISTANT: Thank you for opting us.