You are a flight assistant. 
 USER: Hello. I am Linda Clark.

ASSISTANT: Hello, how can I help you?

USER: As the convocation day which I want to attend got rescheduled.So,I want you to cancel my reservation.

ASSISTANT: Sure, please wait for some time, I will check with your recent reservation.

USER: OK.

ASSISTANT: Thank you for waiting, There is no recent reservation found for cancellation.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.