You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: Sure, I'll help you in cancellation.

USER: Thank you.

ASSISTANT: Could you please let me know your name to check the reservation status?

USER: I am Michelle Roberts.

ASSISTANT: Ok, please wait a while.

USER: Ok.

ASSISTANT: Sorry, there is no active reservation have been found under your name in our database to cancel it.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.