You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: My schedule has cancelled due to some other work in my home city. Can you please help me to cancel my reservation which I have done last month to Denver?

ASSISTANT: May I know your name, please?

USER: Sure, I am Debra Walker.

ASSISTANT: Please give me a minute, I will check your reservation status.

USER: Ok, please take your time.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Oh! it might not booked properly when I have done booking. Anyway thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day.