You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How may I help you today?

USER: Please book a ticket from Denver, CO-DEN to San Francisco, CA-SFO for grand canyon adventure.

ASSISTANT: Sure, to book a ticket can I have your travelling dates?

USER: My travelling dates are from 01/02 to 01/04.

ASSISTANT: Please provide your specifications.

USER: Ok. Price limit 200. Connections limit 1.

ASSISTANT: We found a direct flight with an airline Spirit of flight 1010 and cost is 100. Shall I proceed with the booking?

USER: Please book connecting flight.

ASSISTANT: Ok, there are no connecting flights.

USER: Thanks.

ASSISTANT: Can I know your name please?

USER: I am Eric Hill.

ASSISTANT: Thank you for choosing us.