You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to cancel my reservation, due to some issue.

ASSISTANT: Ok, can you please tell me your name for cancelling your ticket?

USER: My name is Margaret Wright.

ASSISTANT: Ok, please hold on while. Let me check your reservation in my data base.

USER: Sure, you can take your time.

ASSISTANT: Sorry Wright, there is no reservation found with your name to cancel your reservation.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.

USER: Welcome.