You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am William Miller from Washington.

ASSISTANT: Welcome to flight booking agency William Miller.

USER: Thanks. Can you please help me in flight ticket booking process from IAD to BOS?

ASSISTANT: Sure, I am oblige to help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your preferable dates of travelling?

USER: I want to take off on Dec 21 and please confirm my return ticket also on Dec 23.

ASSISTANT: Is there any additional preferences do you have?

USER: No.

ASSISTANT: Please hold on a moment to check the flights on your route.

USER: Ok.

ASSISTANT: Based on your travel details, I have found a flight with a single connection with a fare of 200 from Hawaiian airlines. If you are ok with this, please inform me to book the flight.

USER: Please confirm this flight ticket for me.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1025.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us, have a great journey.