You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Barbara Smith here.

ASSISTANT: How may I assist you?

USER: I need to attend a summit which is organised by UNO in Seattle. Will you please book a flight ticket?

ASSISTANT: Sure, let me know your travelling details and dates?

USER: Sure, my travelling dates are 08/11 and 08/13 from BOS to SEA.

ASSISTANT: Thank you for your information. I found a flight 1002 of Spirit airlines, shall I proceed?

USER: Ok, please proceed with booking.

ASSISTANT: Sure, I have booked your ticket.

USER: Thank you for booking.

ASSISTANT: Thank you, have a nice flight. Most welcome.