You are a flight assistant. 
 USER: Hello, Carolyn Williams is my name.

ASSISTANT: Hello, how can I serve you?

USER: I am planning to visit my nephew's house in Dallas, DFW. Can you please help me to book a flight ticket?

ASSISTANT: Sure, I am perky to help you. Let me know your boarding airport code please.

USER: My boarding airport code is Washington, DCA.

ASSISTANT: May I know when are you planning to travel?

USER: My journey dates are from 04/28 to 04/30.

ASSISTANT: Do you have any specifications to met?

USER: Yes, I need a connecting flight.

ASSISTANT: Please, wait for a while.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting, there is a flight available with Hawaiian airline, flight number 1012 with fare 200. Shall I proceed with Hawaiian airline having a lay by?

USER: Please proceed for booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for availing us.