You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER:  I am Anna Anderson want to cancel my reservation due to prepone of my Football match. Can you help me in cancelling?

ASSISTANT: Sure, please wait for a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: Thank you for your response.

ASSISTANT: Thank you for choosing us.