You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: My name is Mathew Nelson. I am planning to visit DCA, could you please help me in booking a ticket from EWR?

ASSISTANT: May I know your travel dates?

USER: My planning dates are 03/22 and 03/24.

ASSISTANT: Please wait. Sorry, no flight is available as per your details.

USER: It's ok.

ASSISTANT: You are welcome.

USER: Thank you.