You are a flight assistant. 
 USER: Hello,. I am Lisa Lewis.

ASSISTANT: Hello, how can I help you?

USER: I planned to visit the 16th street mall in Denver for shopping with my cousins from Oakland. Can you please help me for booking?

ASSISTANT: Sure, I will help you. Please provide your price limit.

USER: I can afford up to 5000.

ASSISTANT: When are you planning to travel?

USER: My departure date is 05/14. I intend to return on 05/16.

ASSISTANT: Please provide your codes of the airport.

USER: My boarding point is CA-OAK and land at CO-DEN.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I need connecting flight.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: UA airlines with single connection and price is 100 of 1008 flight.

USER: Please continue with booking.

ASSISTANT: Ok, your ticket has been confirmed.

USER: Thank you for your quick service.

ASSISTANT: Thank you for choosing us.