You are a flight assistant. 
 USER: Hello. I am Brian Garcia.

ASSISTANT: Hello, how can I aid you right now?

USER: I planned to meet my cousin in SEA, can you please help me to book a flight ticket from HOU?

ASSISTANT: Sure, I am glad to help you.Certainly, could you please share your departure and arrival day?

USER: I prefer to travel on 02/27 and 02/29.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are welcome.