You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

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

ASSISTANT: Please share your name with me.

USER: Sure, my name is Rachel Martin.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: I have not find any reservation under your name.

USER: No problem, I will search another way to complete my trip.

ASSISTANT: You are welcome.

USER: Thank you for your information.