You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I assist you?

USER: I'm Joshua Phillips. As it's business trip, please book a ticket from Oakland, CA-OAK to Denver, CO-DEN.

ASSISTANT: Sure, I will help you. Please share me your trip dates?

USER: 07/19 is departure date and will return by 07/21.

ASSISTANT: Is there any restrictions in ticket fair?

USER: Ticket price limit is 500.

ASSISTANT: There is a connecting flight with price of 300 and 1017 flight number. Shall I proceed?

USER: Please book a flight.

ASSISTANT: Your booking has been confirmed with AA airline.

USER: Thanks for confirming ticket with AA airline.

ASSISTANT: Thanks for your approach.