You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: As I am a scientist, I want to attend science festival with my students at Philadelphia. Can you do the reservation?

ASSISTANT: Sure, I will help you. May I know your source and destination airport codes please?

USER: My airport codes are SEA-PHL.

ASSISTANT: Can I have your planned journey dates please?

USER: My trip dates are 10/27 and 10/29.

ASSISTANT: May I know your name please?

USER: Kenneth Campbell here.

ASSISTANT: Do you have any specifications?

USER: I need halt in my journey.

ASSISTANT: I found an economy class ticket in Delta airlines with fare 200 and it is a direct flight. Can I book your ticket?

USER: Please proceed.

ASSISTANT: Ok, your booking is confirmed with flight number 1019.

USER: Thank you.

ASSISTANT: Thank you for approaching us.