You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please change my reservation, due to an emergency?

ASSISTANT: Sure, can you  please provide me your name?

USER: My name is Susan  Evans.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Susan Evans. We have found an active reservation by your name.

USER: Ok.

ASSISTANT: Just let us know the new airport codes.

USER: My journey airport codes are, HOU to SFO.

ASSISTANT: May I know your journey dates.

USER: My journey dates are on Dec 29th and 31st.

ASSISTANT: Could you let us know if you have any class preference?

USER: I am ok with any class.

ASSISTANT: Are there any more preferences that you want to avail?

USER: I prefer a connection in between journey. And my  depart time should be in the morning.

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Southwest Airlines is providing economy class flight with number 1018 at a fare of 200. Shall I proceed to change it?

USER: Ok, change my reservation.

ASSISTANT: Your connected flight ticket has been successfully booked.

USER: Thank you for changing my reservation as per my request.

ASSISTANT: Thanks for reaching us.