You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I need to change my reservation because my trip has been postponed, Can yo assist me?

ASSISTANT: Sure, may I know your name please?

USER: Jeffrey Edwards.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Edwards, there is no reservation found as per your name in our database.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for reaching us with a query.