You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jessica Clark.

ASSISTANT: How may I help you?

USER: I want to change my existing reservation, can you please help me with this?

ASSISTANT: Sure, I am here to help you in changing the details. Can you please hold on for a minute?

USER: Sure, take your time.

ASSISTANT: I am happy to tell you that, I have found your reservation.  Can you please share your airport codes?

USER: My airport codes are DFW and LGA.

ASSISTANT: Ok, on which dates you are willing to travel?

USER: I prefer to travel on 03/23 and 03/25.

ASSISTANT: The Southwest airlines is found with connection limit 1 and the price is 200. Can I book your ticket?

USER: Ok, please confirm my booking.

ASSISTANT: Ok, I have booked your ticket with the flight number 1006.

USER: Thank you for your help.

ASSISTANT: You are most welcome. Thank you for approaching us.