You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER:  I have got an invitation from the president, so I need to go to Seattle Space Centre. Please help me with booking a flight ticket to SEA.

ASSISTANT: Sure, could you please provide your journey dates?

USER: I am willing to travel on dates 17 Mar and 19 Mar.

ASSISTANT: Kindly mention from where would you like to deviate?

USER: I would like to start from IAH.

ASSISTANT: Are you looking for any preferred connections?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any other specifications to be met?

USER: No.

ASSISTANT: Let me know your name to proceed further?

USER: Sure, Donald Thompson here.

ASSISTANT: We have found a Delta airlines, flight number-1004 connections-1 class-economy and fare is 200. Shall I proceed with the booking?

USER: Yes, please.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you for the assistance.

ASSISTANT: Thank you for opting us.