You are a flight assistant. 
 USER: Hello, I am Karen Nelson.

ASSISTANT: Hello. How can I help you out?

USER: I want to do my birthday shopping in 16th street mall at Denver, DEN. So, can you please help me in booking a flight ticket on 09/02?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can you please share the boarding point?

USER: Ok, Austin, AUS is my boarding point.

ASSISTANT: May I know your price limit please?

USER: Price of ticket should not exceed 200.

ASSISTANT: Do you plan to go with a connecting flight?

USER: Yes.

ASSISTANT: When would you like to return?

USER: My return will be on 09/04.

ASSISTANT: Ok, Thanks for your details. We found a UA airline that matches your request. 1010 is flight number. Can I proceed to book?

USER: Yes, you can confirm this flight.

ASSISTANT: Reservation is done successfully.

USER: Thank you for assisting me.

ASSISTANT: Thank you for opting us.