You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you today?

USER: My holiday vacation has been postponed. Can you please help me for changing the existing reservation?

ASSISTANT: Sure, I will help you with changing, may I know your name please?

USER: Thank you, my existing reservation is on the name of Paul Collins.

ASSISTANT: Please hold on for a moment to check your reservation status.

USER: Sure.

ASSISTANT: Paul, I did not find any reservation with your name in reservation status.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.