You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you change my reservation which was booked last week?

ASSISTANT: May I know your name please to proceed further?

USER: My name is Ryan Nelson.

ASSISTANT: I found your reservation successfully please share your travel specifications?

USER: My source point is DEN and my destination is PHX.

ASSISTANT: May I know your travel dates?

USER: I plan to travel on Jan 12 and return on Jan 14.

ASSISTANT: Do you have any connection limit preferences?

USER: I prefer a connecting flight.

ASSISTANT: Is there any other concern?

USER: No.

ASSISTANT: South West Airlines is providing the connecting flight and the fare of 300.

USER: Ok, it is good for me.

ASSISTANT: Your reservation is confirmed for the flight 1025.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.