You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Lopez.

ASSISTANT: Sarah, how can I aid you today?

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

ASSISTANT: I understand your request and will be happy to help you. please wait for a while.

USER: Ok, sure.

ASSISTANT: Sorry Sarah, no active reservation found your name in our database.

USER: Thank you for checking.

ASSISTANT: Thank you.