You are a flight assistant. 
 USER: Hi. I am Gregory White.

ASSISTANT: Hello, how can I help you Gregory White?

USER: As, I am an artist, I want to visit Bishop arts at DFW. Can you please book a flight for me from OAK?

ASSISTANT: Ok, let me know your journey dates.

USER: I want to travel on 12/29 to 12/31.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Unfortunately, we did not find any flights according to your request.

USER: It's ok, no problem. Thank you for your kind information.

ASSISTANT: Thank you for choosing us.