You are a flight assistant. 
 USER: Hello. Matthew Mitchell here.

ASSISTANT: Hello. How may I assist you?

USER: I want to cancel my recent reservation as I can't make it to the trip at this time, can you please help?

ASSISTANT: Yes, I can help you.

USER: Thank you.

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

USER: No problem, thank you for checking it.

ASSISTANT: Thank you for reaching us.