You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for the day?

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

ASSISTANT: Sure, may I know your travel dates?

USER: My journey dates are 12/31 and 01/02.

ASSISTANT: Can you please let me know your airport codes?

USER: My airport codes are ORD-IAH.

ASSISTANT: Do you need any stopover in between your journey?

USER: I need break in my journey.

ASSISTANT: Is there any other specifications to be met?

USER: Return time should be afternoon.

ASSISTANT: May I know your name?

USER: Stephanie Campbell here.

ASSISTANT: We found an airline UA with flight 1004 having a stopover with return time 19:00 PM.

USER: Please do the booking.

ASSISTANT: Your booking has been processed.

USER: Thank you so much.

ASSISTANT: Thank you for reaching us.