You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Lewis.

ASSISTANT: How can I aid you today?

USER: I want to book a ticket from DTW to SEA to attend seminar, can you help me in booking?

ASSISTANT: When would you like to depart and arrive?

USER: I am departing on July 11 and return on July 13.

ASSISTANT: Do you want to fly with economic class or business class?

USER: I am ok with any class.

ASSISTANT: Please provide your specifications.

USER: I need a flight with connection limit 1.

ASSISTANT: Just hold on a moment.

USER: Sure, take your time.

ASSISTANT: There is a flight available with an airline Hawaiian of flight 1006 in business class.

USER: Please proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.