You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I need to book a ticket from IAH to BOS. Could you book a ticket?

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

USER: I am Matthew King.

ASSISTANT: Thank you. Please help me with your planned travelling dates.

USER: My travelling dates are from Oct, 5 to Oct, 7.

ASSISTANT: Do you need a direct or connecting flight?

USER: I prefer connecting flight.

ASSISTANT: Please help me with your preferred class to fly.

USER: I prefer to fly in the normal-cost airline.

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

USER: I would like to return in the afternoon.

ASSISTANT: Please allow me a minute.

USER: Sure.

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

USER: Thank you.

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