You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I want to change my existing reservation which is done recently, can you please help me?

ASSISTANT: Sure, let me check about your request. Could you please share your name?

USER: Sure, my name is Jennifer Edwards.

ASSISTANT: Your reservation found, can you share your details for further process?

USER: Sure, my respective airports codes are from OAK to IAH.

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My dates of journey are from 11/30 to 12/02.

ASSISTANT: We have found a connected flight with Frontier airlines, flight number 1027 and the fare of 200.

USER: Ok, you can book it.

ASSISTANT: Ok, your booking is done.

USER: Thank you for your help in changing my reservation.

ASSISTANT: Your welcome.