You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,how may I best serve you today?

USER: I want a flight with low fare of 500, as my existing reservation fare is 5000. Can you help me to change my reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name please so that I can check the reservation list and update your reservation?

USER: Please check the reservation with the name of Kenneth Gonzalez.

ASSISTANT: Thanks for providing your name, please be on hold.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting, sorry to say you that there is no active reservation under your name to change the reservation.

USER: Oh! may be booking not done properly. Thanks for your prompt response.

ASSISTANT: Thanks for approaching us, have a nice day.