You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need your help to book a flight ticket to reach Washington. Please help me.

ASSISTANT: May I know your trip dates?

USER: Feb 13 and 15 are my planned travel dates.

ASSISTANT: Do you prefer any connections?

USER: Yes, I do need a connecting flight.

ASSISTANT: May I know your airport codes?

USER: MSP and IAD are the airport codes.

ASSISTANT: Do you prefer any specifications?

USER: I prefer to fly in a normal-cost airlines.

ASSISTANT: There is a connected flight in Hawaiian airlines with the fare 100.

USER: Great! Please book ticket in that flight.

ASSISTANT: May I know your name?

USER: Brian Moore is my name.

ASSISTANT: Your booking is done.

USER: Thank you for the help.

ASSISTANT: Thank you.