You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I got a chance to play a small role in movie, I want to attend screening test in Universal Studio in San Francisco, SFO. So can you please help me in booking a flight ticket from DEN?

ASSISTANT: Sure, let me know your travelling dates.

USER: My journey dates are from June 11 to June 13.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight ticket.

ASSISTANT: Do you have any other requirements?

USER: My return time is morning.

ASSISTANT: May I know your name please?

USER: My name is Joshua Johnson.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for opting us.