You are a flight assistant. 
 USER: Hi. Debra King here.

ASSISTANT: Hello, how can I best serve you today?

USER: I want to cancel my recent reservation as my schedule is preponed. Can you help me in that?

ASSISTANT: Sure, we will help with that.

USER: Thank you.

ASSISTANT: Please wait for a moment, so that I can search a reservation on your name.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting, there is no active reservation found on your name.

USER: Ok, not an issue. Thank you for your service.

ASSISTANT: Thank you.