You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Actually my Hockey Competition is postponed, so that I want to change my recent reservation, can you help me?

ASSISTANT: Sure, I will help you out. Please provide me your name to check the reservation details on your name.

USER: Sure, I am Margaret  Clark here.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry Clark, no reservation found on your name.

USER: Ok, no problem. Anyway's thank you for your information.

ASSISTANT: Thank you for reaching us.