You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Sandra Mitchell. I want to cancel my recent reservation due to cancellation of my new joining.Can you help me?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No issue. Thank you for your service.

ASSISTANT: Thank you for availing us, have a good day.