You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Please book a flight ticket from BOS to LAS. Can you please aid me for booking?

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

USER: Sure, my name is Amanda Wilson.

ASSISTANT: Please allow me with your planned travel dates.

USER: My planned dates are June 20 to 22.

ASSISTANT: Please let me know with your preferred Airlines to fly.

USER: I prefer to go in normal cost airlines.

ASSISTANT: Do you need a direct or connecting flight?

USER: I prefer a connected flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: No.

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

USER: Ok, thanks for your response.

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