You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you?

USER: My name is Nancy Wright.

ASSISTANT: Yes, Nancy.

USER: I want to change my existing reservation, due to health issue.

ASSISTANT: I found your reservation, may I know your new airport codes?

USER: Ok, my new airport codes are DFW and ORD.

ASSISTANT: Can you please tell me your planning dates?

USER: My travelling dates are from 01/27 till 01/29.

ASSISTANT: Ok, wait a moment.

USER: Make sure that my connection limit should be 1.

ASSISTANT: According to your requirement, There is a flight found with 1 connection. Can I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket has been booked with flight 1006 and airline is Southwest.

USER: Thank you for booking.

ASSISTANT: Thank you for opting us.

USER: Welcome.