You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Linda Phillips. I have a business meeting in Washington, can you please help me for booking?

ASSISTANT: I can help you make your reservation. Could you please tell me the depart and destination airport code?

USER: My source airport code is ORD and destination airport code is IAD.

ASSISTANT: Well. Can you provide me your journey dates?

USER: I would like to travel on 12/04 and return on 12/06.

ASSISTANT: Please give me a moment to search for the availability of the flights that will fit your schedule.

USER: Please search a direct flight for me.

ASSISTANT: Sorry Phillips, there are no flights available with zero connections.

USER: That's ok, thank you for checking.

ASSISTANT: You're welcome. We are glad to serve you.