You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Actually my Hockey competition is postponed, so that I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, I am here to help you. Can you please tell me your name?

USER: Thank you. I am Charles Carter.

ASSISTANT: Ok, please wait a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry to inform you that, there is no active reservation found with your name to change the details.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: You are welcome. Thank you for choosing us.