You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Matthew Roberts, can you please help me to cancel my recently done reservation?

ASSISTANT: Sure. Give me a moment.

USER: OK.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: OK, that's fine.

ASSISTANT: OK.

USER: Thank you, for consulting us.

ASSISTANT: Thank you for reaching us.

USER: Thank you.