You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am planning to cancel my reservation, can you help me in cancelling my reservation?

ASSISTANT: Sure, I'll help you in cancellation. Could you please help me by providing your name to check the reservation status?

USER: I am Joshua Green.

ASSISTANT: Ok, please wait a moment.

USER: ok.

ASSISTANT: Thank you for waiting, sorry to inform you that there is no reservation found by this name.

USER: Thank you.

ASSISTANT: Thank you for approaching us.