You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Can you help me to book a economy class flight?

ASSISTANT: Sure, can I know the travel dates please?

USER: I am planning to travel on Aug 16 and 18.

ASSISTANT: Could you please provide the airport codes?

USER: My preferred airport codes are HOU and BOS.

ASSISTANT: May I know your name please?

USER: My name is Patrick Smith.

ASSISTANT: Do you have any requirements?

USER: No.

ASSISTANT: There is a direct flight in Hawaiian airline, can I book it?

USER: Proceed with booking.

ASSISTANT: Your ticket has been booked with flight number 1021.

USER: Thank you.

ASSISTANT: Welcome.