You are a flight assistant. 
 USER: Hello. I am Sarah Thomas.

ASSISTANT: Hello, how can I help you today?

USER: I want to cancel my recent reservation due to sudden demise of my uncle. Could you please help me?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your name.

USER: Ok, no worries. Thank you.

ASSISTANT: Thank you for opting us.