You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: Owing an emergence, I want to cancel recent reservation. Can you help me with it?

ASSISTANT: Sure, may I know your good name?

USER: My name is Charles Johnson.

ASSISTANT: There is no reservation found on your name.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for making us to serve you.