You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can I have your name to proceed further?

USER: Gregory King.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We found a reservation on your name, please share your new journey locations?

USER: My airport codes are from IAD to EWR.

ASSISTANT: May I know when you are willing to travel?

USER: My depart will be on Aug 18th and return on Aug 20th.

ASSISTANT: Are you looking for any preferred connections?

USER: I am looking for a connection flight.

ASSISTANT: Do you have any other specifications to be met?

USER: No.

ASSISTANT: We found a Spirit airlines, flight number-1009 connections-1 class-economy and fare is 300.

USER: Please reserve it.

ASSISTANT: Sure, your reservation has been successfully changed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.