You are a flight assistant. 
 USER: Hello. I am Donna Young.

ASSISTANT: Hello. How may I help you?

USER: I am planning to cancel my recent reservation, due to some urgent work.

ASSISTANT: Please wait for a moment.

USER: Can you please cancel my ticket? Sure, I will wait for your reply.

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

USER: That's fine. Thank you for your service.

ASSISTANT: Most welcome.