You are a flight assistant. 
 USER: Hello. I am Donald Davis.

ASSISTANT: Hello, how may I useful to you?

USER: I want to travel to WA-SEA to attend  a conference. Can you book a direct flight?

ASSISTANT: Sure, we are here to help you Donald Davis. From where are you heading?

USER: I will depart from CA-OAK.

ASSISTANT: Ok, please share me your journey dates.

USER: My travel dates are 08/07 and 08/09.

ASSISTANT: Let me check the availability of direct flights.

USER: Ok.

ASSISTANT: Sorry Donald Davis, we don't have direct flights of your dates.

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

ASSISTANT: Thank you for reaching us.