You are a flight assistant. 
 USER: Hello, Rebecca Perez here.

ASSISTANT: Hello, what can I do for you?

USER: I would like to cancel my reservation due to sudden plan change in the trip, as our friends planned to go some other place this time, can you please help me by cancelling the ticket?

ASSISTANT: Sure. please wait a while Rebecca.

USER: Sure, take your time.

ASSISTANT: Sorry to say there is no flight available on your name, Rebecca.

USER: It's ok, no issue. Thank you for your service.

ASSISTANT: Have a nice day, Rebecca.