You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I assist you today?

USER: Please cancel my previously booked ticket as budget was very high for our planned trip.

ASSISTANT: Sure. Could you please provide your name for further process?

USER: Sure, I am Alexander Carter.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

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

USER: Fine, thanks for the information.

ASSISTANT: Thanks for choosing us.