You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Karen Johnson here.

ASSISTANT: How can I assist you today?

USER: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation.

ASSISTANT: Sure, will you mention your name for checking the reservation status?

USER: I mentioned above.

ASSISTANT: Your reservation is found. Please provide your airport codes.

USER: My airport codes will be DFW to EWR.

ASSISTANT: Please provide your travelling dates.

USER: My travelling dates are Sept 02 and Sept 04.

ASSISTANT: Please mention if you have any preferences about flight connections.

USER: My class preference is economy.

ASSISTANT: Please give me a moment.

USER: Sure, take your own time.

ASSISTANT: The Spirit airlines providing an economy class flight with price 300 and the connections 1. Shall I confirm your ticket?

USER: Ok, please book.

ASSISTANT: Your ticket is booked. The flight number is 1014.

USER: Thank you for your help.

ASSISTANT: Welcome, have a great day.