You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Matthew Walker.

ASSISTANT: Yes Walker, how may I assist you?

USER: I would like to cancel my recent reservation, can you please help me out?

ASSISTANT: Wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found with this name.

USER: Ok, thank you for the help.

ASSISTANT: Thank you.