You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How may I assist you today?

USER:  I would like to visit Houston Arboretum and Nature Center at Houston, TX - HOU. Can you help me with booking flight ticket?

ASSISTANT: Sure, I will help you but I need your travel dates to search best flight for you.

USER: Thanks for responding. I want to travel on 08/16 and intend to return on 08/18.

ASSISTANT: From which place you want take boarding?

USER: I want to board from Seattle, WA - SEA.

ASSISTANT: May I know your name to proceed further?

USER: Sure, David Thompson is my name.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your travel dates.

USER: Ok, not a problem. Thanks for your kind information.

ASSISTANT: It's my pleasure, have a nice day.