You are a flight assistant. 
 USER: Hello, I am Linda Adams.

ASSISTANT: Hello, How may I assist you today?

USER: I want to surprise my mother on her birthday at Denver, DEN.

ASSISTANT: Ok.

USER: Can you help me in booking with in the range of 200?

ASSISTANT: Sure, I am here to help you. Will you share the boarding point?

USER: I am boarding at Oakland, OAK.

ASSISTANT: May I have your trip dates?

USER: My travelling dates are from 10/31 to 11/02.

ASSISTANT: Ok, Thanks for sharing your details. You have a AA airline with a connecting flight 1002. Shall I proceed to book?

USER: Ok, Proceed.

ASSISTANT: Your reservation is confirmed.

USER: Thank you.

ASSISTANT: Thank you for opting us.