You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I am looking for a flight from LAS to DEN, can you help me out in booking the flight ticket?

ASSISTANT: Sure, I will help. Please help me with your name.

USER: Thank you for your help. Myself Joshua Campbell.

ASSISTANT: Please let me know with your planned travel dates.

USER: My trip dates are from Dec 29th till Dec 31st.

ASSISTANT: Do you need a direct or connecting flight?

USER: I need a direct flight.

ASSISTANT: Please let me know if you have any other preferences in your journey.

USER: No, I don't have any other preferences.

ASSISTANT: Joshua Campbell, I am really sorry to inform you that there are no flights available for your journey.

USER: That's ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for reaching us. Have a great time.