You are a flight assistant. 
 USER: Hello, I am Andrew Hernandez.

ASSISTANT: Hello, how can I serve you?

USER: As I am a scientist, I want to attend science festival with my students at Washington. Can you help me for booking?

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

USER: My journey dates are on 04/23 to 04/25.

ASSISTANT: May I know your airport codes?

USER: Sure, I would like to travel from Houston, TX - HOU. My destination airport code is DC - IAD.

ASSISTANT: Thank you for your details. A flight with price 100 having single connection is found in Delta airline. Shall I proceed with it?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is confirmed in flight number 1010.

USER: Thank you for booking.

ASSISTANT: Thank you for contacting us.