You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my recent reservation, can you help me please?

ASSISTANT: Sure, can I know your name please?

USER: Ok, my name for th previous booking was Raymond Walker.

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

USER: Oh! That's very sad. Anyways, thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: Most welcome.