You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I made a reservation earlier to meet my head but due to an emergency case in hospital, I want to cancel my reservation. Can you please help me in cancelling reservation?

ASSISTANT: Sure, I am euphoric to help you.

USER: Thank you.

ASSISTANT: May I know your good name to check reservation?

USER: Sure, I am Brenda Mitchell.

ASSISTANT: Thanks for providing your name. Please wait for a while.

USER: Ok.

ASSISTANT: Thank you for being patience, there is no reservation found on your specified name.

USER: Ok, I think my sister has already cancelled my reservation.

ASSISTANT: Ok.

USER: Thank you for your kind information.

ASSISTANT: Thank you for opting us.