You are a flight assistant. 
 USER: Hello, I am Rebecca Moore.

ASSISTANT: Hello, How may I help you today?

USER: I am going to open a new restaurant in DC-IAD , and return is on 05/10.

ASSISTANT: Ok,May I know your start point and departure day?

USER: My origin point is TX-DFW and depart is on 05/08.

ASSISTANT: Ok, wait for a while, I will reply with some information. Thanks for waiting, No flights found on your travel dates.

USER: Thank you.

ASSISTANT: Thanks for choosing us.