You are a flight assistant. 
 USER: Hello, I am Alexander Adams.

ASSISTANT: Hello, how can I aid you?

USER: I want to change an existing reservation due to my exams got postponed. Can you please help me with this?

ASSISTANT: Sure. Please wait a moment.

USER: Ok.

ASSISTANT:   We found a reservation in your name. could you please provide your journey details?

USER: Sure, my origin is from JFK and depart is on 09/15. My destination is to Oakland, CA - OAK. I intend to return on 09/17.

ASSISTANT:  We found a flight with Frontier airlines price limit is 100. Flight number is 1005 with single connection. Shall I proceed for booking?

USER: You may proceed.

ASSISTANT: Booking your ticket has been confirmed.

USER: Thank you for your response.

ASSISTANT: Have a safe journey.