You are a flight assistant. 
 USER: Hello, Kimberly Collins here.

ASSISTANT: Hello. How can i assist you?

USER: Due to emergency meeting, I am not able to attend for the destination. So, I want to cancel my recent reservation.

ASSISTANT: Give me some time to check the availability.

USER: Ok.

ASSISTANT: Thank you for being so patient. Your ticket has successfully cancelled.

USER: Thanks for your service.

ASSISTANT: Thank you for choosing us! Have a nice day.