You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Alexander Hernandez. I want to change my existing reservation. Can you help me for that?

ASSISTANT: Sure, please wait for a moment to check your ticket status in our website.

USER: Ok.

ASSISTANT: I found your previous reservation, could you share your airport codes?

USER: My airport codes are HOU and EWR.

ASSISTANT: May I know your itinerary dates?

USER: My travelling dates are 12/10 and 12/12.

ASSISTANT: Please hold on for a while to check for available flights.

USER: Make sure that my connection limit should be 1.

ASSISTANT: Spirit airlines with flight 1006 is providing service with 1 connection and ticket costs you 200.

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for booking.

ASSISTANT: Thank you for approaching us.

USER: Welcome.