You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name?

USER: Myself Helen Lewis.

ASSISTANT: Wait a minute.

USER: Sure, I will wait.

ASSISTANT: We could not find any reservation on your name.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing us.