You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: My holiday vacation got postponed, will you help me in changing the existing reservation?

ASSISTANT: Sure, I am here to help you. I need your name to check the reservation.

USER: My name is Donna Moore.

ASSISTANT: Hold on a while, I will let you know the status.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: We did not find any reservation on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.