You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am searching for a flight booking services that who can cancel my recent booking. Is this a flight booking agency?

ASSISTANT: May I know your name for cancelling the ticket?

USER: I am Gregory Smith.

ASSISTANT: Sorry Smith, I did not found any reservation with your name.

USER: Ok, that's fine, thank you for your help.

ASSISTANT: Thank you for choosing us.