You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Margaret Lee here. I want to change my existing reservation, due to heavy rain. Can you please help me for that?

ASSISTANT: I found a reservation with your details, can I know your further details?

USER: My new airport codes are DTW and OAK. My trip dates are 07/18 and 07/20.

ASSISTANT: Basis on your details, I got a flight with flight number 1020.

USER: Please make sure that, my connection limit should be 1.

ASSISTANT: Yes, can I proceed?

USER: Ok, proceed.

ASSISTANT: Your ticket was confirmed.

USER: Thank you for booking.

ASSISTANT: You are welcome.