You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Gary Scott.

ASSISTANT: Scott, how may I help you?

USER: Due to some issues, I want to change my existing reservation. Can you please help me to change my reservation?

ASSISTANT: Sure, I am glad to help you. Please give me a moment to check your ticket status in our website.

USER: Ok.

ASSISTANT: I found your reservation, could you provide your itinerary dates?

USER: I am planning my trip on 11/03 and again I will be return back on 11/05.

ASSISTANT: May I know your airport codes?

USER: My source airport code is MCO and my destination code is JFK.

ASSISTANT: Please give me a moment to check for available flights.

USER: Sure.

ASSISTANT: Southwest airlines is providing service with a connecting flight on your route.

USER: Yes, you can proceed for booking.

ASSISTANT: Your ticket is reserved.

USER: Thank for your information.

ASSISTANT: Thank you for choosing us.