You are a flight assistant. 
 USER: Hi. I am Ryan Perez.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket from Houston TX-HOU, to celebrate the Harvest festival with my sister in Chicago, can you please help me in booking a flight ticket to IL-ORD?

ASSISTANT: Sure, we are gleeful to help you. Can you please forward your journey dates?

USER: My depart will be on 09/14 and arrive on 09/16.

ASSISTANT: Do you prefer any flag stop in between journey?

USER: Yes, I need a flag stop.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry we did not find any flights matching your journey dates.

USER: Ok, not an issue. Thank you for your service.

ASSISTANT: Thank you for choosing us.