You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Dennis Lopez. I would like to book a flight ticket to attend international conference about religious festivals at Seattle. Can you help me in my booking?

ASSISTANT: Sure, can you please help me with your trip dates?

USER: I will start my journey on 07/13. I will return on 07/15.

ASSISTANT: May I know your airport codes please?

USER: My source airport code is Washington, DC - IAD. My destination airport code is Seattle, WA - SEA.

ASSISTANT: Do you have any specifications?

USER: I need a layover in my journey.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: We found a flight with JetBlue airlines, flight number is 1020 with one connection and price is 100.

USER: Please, proceed with my booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thanks for choosing us.