You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER:  I am Betty Adams. I want to cancel my reservation due to prepone of my sister wedding. Can you please help me in cancelling my ticket?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

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

USER: Thank you for your response.

ASSISTANT: Thanks for choosing us.