You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid 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 that, please hold on for a moment to check your reservation status.

USER: Sure, my name is Angela Thompson.

ASSISTANT: Angela, I did not find any reservation with your name in my database.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.