You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brenda Adams.

ASSISTANT: How may I serve you today?

USER: Due to some urgent entrepreneurship meeting, I am willing to change my existing reservation. Can you please help me for this?

ASSISTANT: Sure, I'll try to help you in changing an existing reservation.

USER: Thank you.

ASSISTANT: Please wait a moment I will check the reservation status.

USER: Ok.

ASSISTANT: Thank you for waiting, we found a reservation by this name. Kindly share your updated travelling dates to proceed further.

USER: Apr 15th and 17th are my travelling dates.

ASSISTANT: May I know your source and destination airport codes?

USER: LGA and ORD are my airport codes.

ASSISTANT: Do you need a whistle stop in between your journey?

USER: I need a connecting flight.

ASSISTANT: Please let me know if you have any other comforts in between your journey.

USER: No.

ASSISTANT: Ok, give me sometime.

USER: Ok.

ASSISTANT: Thank you for waiting, we found an economy class ticket providing by UA airline with the flight number-1019.

USER: That's Perfect, you can reserve it.

ASSISTANT: Your seat has been reserved with the connecting flight.

USER: Thank you for your help.

ASSISTANT: It's pleasure to serve you.