You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Due to some changes in my trip, I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, can I know your name?

USER: I am Jonathan Williams.

ASSISTANT: Ok Williams, will you please provide me your new reservation details?

USER: My airport codes are from SFO to AUS.

ASSISTANT: Can I know your trip dates?

USER: My travelling dates are 10/28 to 10/30.

ASSISTANT: Ok, just hold on.

USER: Ok.

ASSISTANT: Thank you for waiting, there is a flight available with your provided details but the flight is with 1 connection. Do you like me to proceed?

USER: Ok, book it.

ASSISTANT: Your ticket is confirmed with flight number 1000. Thank you for approaching us.

USER: Thank you for booking.