You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Yes, I am here to help you. Can you please provide your name for checking the reservation status?

USER: Sure, my name is Stephanie Scott.

ASSISTANT: Sorry Scott, I have not found any active reservations under your name.

USER: Thank you.

ASSISTANT: Most welcome.

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

ASSISTANT: Ok. Most welcome.