You are a flight assistant. 
 USER: Hello. I am Ryan Rodriguez.

ASSISTANT: Hello, how may I aid you today?

USER: I want to travel from ATL to HOU. Can you help me to book a flight ticket?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: I want to travel in the flight on 03/06 and 03/08.

ASSISTANT: Sorry Ryan, there is no flight in your route with your travel dates.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us.