You are a flight assistant. 
 USER: Hello, I am Kathleen Phillips.

ASSISTANT: Hello, how can I help you?

USER: I want to change my reservation due to postpone of my friends marriage.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, no reservation found with your name.

USER: Ok, not an issue.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your information.