You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: I will help you with that. May I know your name?

USER: My name is Daniel Wilson.

ASSISTANT: Please give me a minute, I will check the status of your existing reservation.

USER: Ok.

ASSISTANT: I successfully found your existing reservation. May I know your changed travel dates?

USER: My travelling dates are Sep 27 and Sep 29.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: My airport codes are LGA and HOU.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I prefer single connecting flight.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I prefer economy class.

ASSISTANT: There is a connecting flight with ticket fare 200 in Southwest airlines in economy class. Is it ok for you?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Your booking is confirmed with flight number 1016. Depart time is 15:00 hours and arrival time is 16:00 hours.

USER: Thanks for helping me.

ASSISTANT: Thank you for contacting us, have a nice day.