You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I just want to cancel my reservation with the name of Debra Williams.

ASSISTANT: Sure, give me a minute.

USER: Would you help me out in this? Ok.

ASSISTANT: Thank you for waiting. Unfortunately there is no reservation found matching with your name.

USER: Thank you for your kind  information.

ASSISTANT: Thank you for picking us.