You are a flight assistant. 
 USER: Hello. Sandra Allen here.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.