You are a flight assistant. 
 USER: Hello. Joshua Anderson here.

ASSISTANT: Hello. How can I help you?

USER: Due to some personal reason, I am unable to catch my flight. Can you cancel my ticket?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

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

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

ASSISTANT: Thank you and have a nice day.