You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mary Walker here.

ASSISTANT: Mary Walker, how may I assist you today?

USER: I would like to meet my brother at Denver, please help me in booking a ticket from DCA to DEN.

ASSISTANT: Sure, I will help you. Please help me with your travel dates.

USER: My planned travel dates are on May 04 and May 06.

ASSISTANT: Mary Walker, do you need a direct flight or connecting flight?

USER: I need a connecting flight with normal airline cost.

ASSISTANT: I am glad to inform you that there is a connecting flight operated by Hawaiian airlines with a fare of 200. Is it ok for you?

USER: Ok, please book my ticket.

ASSISTANT: I have booked your ticket in flight-1025.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us. Have a great journey.