You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to book a ticket from HOU to LAS?

ASSISTANT: Sure, can you please share your planned travel dates?

USER: My travelling dates will be on Aug 20 to Aug 22.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I want to travel in a direct flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name please?

USER: Melissa Moore here.

ASSISTANT: We found a Delta airline, flight number: 1005, price: 200, it is a direct flight.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.