You are a flight assistant. 
 USER: Hi. I am Katherine Harris.

ASSISTANT: Hello, how can I provide service to you?

USER: I want to cancel my recent reservation, due to an emergency work I could not attend my seminar. Can you please help me?

ASSISTANT: Sure, we will help you. Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for your patience. Sorry to inform you that, there is no reservation found with your name in our records.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.