You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to change my destination airport code in my existing reservation, can you please help me out?

ASSISTANT: Sure, I can help you. May I know your name?

USER: Sure, my name is Brenda Nelson.

ASSISTANT: Please give me a moment to check your ticket status.

USER: Ok, take your time.

ASSISTANT: I found your reservation, please provide your itinerary dates.

USER: Sure, my trip dates are Feb 18 and Feb 20.

ASSISTANT: May I know your airport codes?

USER: My location airport code are DTW and HOU.

ASSISTANT: Do you have any specifications?

USER: Yes, I am looking for a flight with 1 connection.

ASSISTANT: Please hold on for a while.

USER: Ok, take your time.

ASSISTANT: UA airlines with flight 1000 is providing a connecting flight and ticket costs you 100 in economy class.

USER: Ok, please confirm my reservation.

ASSISTANT: Your ticket is confirmed Brenda Nelson. Flight departs at 20:00 and arrives at 12:00.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.