You are a flight assistant. 
 USER: Hello.

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

USER: Please change my active reservation as my meeting was changed.

ASSISTANT: I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Margaret Jackson.

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

USER: Ok, I will wait.

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

USER: I have planned to travel on July 19th and return on July 21st.

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

USER: From MSP to MCO.

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

USER: I am looking for one connecting flight.

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

USER: No thanks.

ASSISTANT: Sorry, there are no flights available at your request.

USER: Ok, no problem. Thank you.

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