You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in cancelling my reservation?

ASSISTANT: May I know your name?

USER: I am Gregory Walker.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting, I have gone through the reservation list twice but could not find any reservation active under your name.

USER: No problem, thank you.

ASSISTANT: Welcome Gregory Walker.