You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Can you please change my reservation as the event which I want to attend got postponed due to bad weather?

ASSISTANT: Sure, I will help you. please tell me your name.

USER: I am Edward Lopez.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Lopez, I did not find any reservation under your name.

USER: It's ok, thank you for your information.

ASSISTANT: It's my pleasure, have a great day.