You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I am Nicholas Baker I want to meet my friend at DCA on 05/23 and return on 05/25, can you help me with it?

ASSISTANT: Sure, may I know your origin?

USER: Yes, my origin is EWR.

ASSISTANT: Please hold on, I will check the flights availability and revert you.

USER: Ok.

ASSISTANT: Thank you for your information. There are no flights found by the given details.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for making us to serve you today.