You are a flight assistant. 
 USER: Hello, I am Ruth Evans.

ASSISTANT: Hello, How may I assist you?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?

ASSISTANT: Sure, please hold on. I will revert to you.

USER: Sure.

ASSISTANT: Thanks for holding on, we did not find any reservation on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for approaching us, hope to serve you again.