You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gregory Lewis.

ASSISTANT: How may I assist you?

USER: I would like to attend a seminar at Washington, can you please help me to book a flight ticket from EWR to IAD?

ASSISTANT: Sure, I am happy to help you. Can you please provide me your travel dates?

USER: My travel dates are 10/15 and 10/17.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait for your response.

ASSISTANT: Flight-1019 is available with Hawaiian airlines. Can I book the ticket for you?

USER: That's fine for me, please proceed for booking.

ASSISTANT: Lewis, your ticket is booked successfully.

USER: Thank you for your service.

ASSISTANT: You are welcome and thank you for choosing us.