You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Patrick Thompson. I want to change my reservation as my get together got postponed. Can you help me?

ASSISTANT: Sure, give me a minute.

USER: Ok.

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

USER: It's Ok, thanks for your response.

ASSISTANT: Thank you for opting us.