You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you book a direct flight for me to reach Los Angeles?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please help me with your name.

USER: Sure, Steven Clark here.

ASSISTANT: Please help me with your planned travelling dates.

USER: My travel dates are Nov 08 and 10.

ASSISTANT: Please help me with your source airport code.

USER: My source is from Boston, BOS.

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

USER: I don't have any preferences.

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

USER: Ok, thank you.

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