You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a flight ticket from DEN to LAX?

ASSISTANT: Sure, may I know the travelling dates?

USER: I will start on Feb, 12 and return on Feb, 14.

ASSISTANT: Do you have any connection limit?

USER: I need direct flight.

ASSISTANT: May I know your name?

USER: Robert Hill here.

ASSISTANT: Sorry, no flights found with your chosen dates.

USER: Not a problem, thank you for the information.

ASSISTANT:  Thank you for opting us.