You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Justin Lopez. Can you please be my helping hand in changing my existing reservation?

ASSISTANT: Sure Justin, please wait a moment.

USER: Ok.

ASSISTANT: I found your reservation, can you please provide the airport codes?

USER: My airport codes are LGA - MCO.

ASSISTANT: Can I know your travel dates please?

USER: My trip dates are 07/27 - 07/29.

ASSISTANT: There is a connecting flight with price 100, can I book it?

USER: Please reserve.

ASSISTANT: Your reservation has been changed with flight number 1001.

USER: Can you please assign the airline?

ASSISTANT: The airline is Southwest.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.