You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Sarah Martin. I want to cancel my recent reservation, due to some personal issues. Could you please help me?

ASSISTANT: Sure Sarah, I am here to help you with this.

USER: Thank you.

ASSISTANT: Sorry Sarah, there is no reservation found as per your name to cancel it.

USER: It's ok, no more issues. Thank you for checking.

ASSISTANT: You are welcome.