You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to do some changes in the existing reservation because my friends are not able to come on the those dates, can you please help me?

ASSISTANT: Sure, can I know your name?

USER: Myself Laura Garcia.

ASSISTANT: Can I know your travel details?

USER: My travelling starts from AUS, and land on DTW.

ASSISTANT: Can I know your travel dates?

USER: My required dates are from 02/27 till 02/29.

ASSISTANT: The flight 1013 of Spirit airlines is available on your requested dates. Shall I proceed?

USER: Please, proceed.

ASSISTANT: Your reservation has been changed successfully.

USER: Thank you for your help.

ASSISTANT: Welcome.