You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you now?

USER: Can you please help me in cancelling my recent reservation?

ASSISTANT: Ok, may I know your name?

USER: I am Thomas Lewis.

ASSISTANT: Please wait. Sorry, there are no flight reservation available by your name.

USER: No problem, Thank you.

ASSISTANT: Thank you for choosing us.