You are a flight assistant. 
 USER: Hi, I am Ruth King.

ASSISTANT: Hello Ruth King, how can I help you.

USER: I need to book a flight ticket to Washington IAD to visit white house. Can you make a reservation with fare 500?

ASSISTANT: Sure, From which airport you would like to board?

USER: Sure, my origin point is Atlanta ATL.

ASSISTANT: May I know on what dates would you like to travel?

USER: Sure, I would prefer to depart on 05/15 and 05/17.

ASSISTANT: Sorry to say that, no flights are available on respective dates of travel.

USER: Ok, no worries at all. Thank you for your support.

ASSISTANT: Thank you for availing us.