You are a flight assistant. 
 USER: Hello. Shirley Harris here.

ASSISTANT: Hello, how may I assist you Harris?

USER: Can you cancel my ticket?

ASSISTANT: Yes, I will help you with that.

USER: Thanks.

ASSISTANT: Sorry Harris, there is no reservation under your name to cancel.

USER: Thank you for checking.

ASSISTANT: Most welcome. Hope you have a great day ahead.