You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I be of your address?

USER: I am Ryan Johnson. Can you help me in booking a ticket from LAX to DEN?

ASSISTANT: Sure, kindly share your fare preference.

USER: My price limit is 500.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a direct flight.

ASSISTANT: Please let me know your planned travelling dates.

USER: My planning dates are from 04/09 to 04/11.

ASSISTANT: Give me a while I will check and let you know.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry to inform you that there are no flights found in between your journey routes.

USER: That's ok. I will try other alternative. Thank you for your help.

ASSISTANT: Thanks for choosing us, have a nice day.

USER: You are welcome.