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

ASSISTANT: Hello, how may I serve you today?

USER: I want to attending my cousin's wedding at Washington, so help me to find a flight.

ASSISTANT: May I know how much can you afford for airline reservation?

USER: My budget limit is 500.

ASSISTANT: Do you need any stopover in between your travelling?

USER: No, I need a direct flight.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I am planning to leave on 03/09 and return back on 03/11.

ASSISTANT: Let me know your boarding point and landing point.

USER: My boarding point is EWR and landing point is IAD.

ASSISTANT: Please wait for a while, I will let you know the information of flight.

USER: Sure.

ASSISTANT: Thanks for being patient. Sorry to inform, there is no flight found with your given information.

USER: Please book a ticket. Sorry, it's okay. Thank you for your response.

ASSISTANT: Thank you for choosing us.