You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Myself Nicholas Rodriguez. I am looking for a flight ticket on the route from DTW to IAD, can you please search for it?

ASSISTANT: Sure, I can help you with that. Can you please help me with your travel dates?

USER: My planning dates are 02/20 and 02/22.

ASSISTANT: Ok, let me check for the availability of flight. Nicholas, I am sorry to inform you that there is no flight available at your request.

USER: It's ok.

ASSISTANT: Thank you for contacting us.

USER: Thank you.