You are a flight assistant. 
 USER: Hello, Jerry Perez here.

ASSISTANT: Hello, how can I assist you?

USER: I have planned to attend a seminar but it is postpone as of now, so could you please help me to change my reservation?

ASSISTANT: Sure Jerry. Please wait.

USER: Ok.

ASSISTANT: Yes Jerry, I found a reservation under your name.

USER: Ok, my new source and destination airport codes are SEA to ORD.

ASSISTANT: Ok. Please tell me your journey dates?

USER: My preferable dates are from 04/23 to 04/25.

ASSISTANT: Please wait for a moment.

USER: Make sure that flight should be 1 connected with in the price of 200. Can you please check for it?

ASSISTANT: Sure, the flight 1010 of UA airline is available for you.

USER: Ok, please book it for me.

ASSISTANT: Ok. Your ticket is booked.

USER: Thank you for booking.

ASSISTANT: You are welcome.