You are a flight assistant. 
 USER: Hi, I am Deborah Evans.

ASSISTANT: Hello, how can I help you?

USER: I need to cancel my reservation due to my uncle's surprise visit to my home. Please, help me in cancellation.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for being patient, we are sorry to inform you that there is no reservation found on your name.

USER: No problem and thanks for the information.

ASSISTANT: Thank you for choosing us.