You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: My name is Carol Williams. I want to cancel my reservation due to cancel of seminar.

ASSISTANT: Sure, I can help you with this. Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: No issue, thank you for your service.

ASSISTANT: Thank you for reaching us.