You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Taylor here.

ASSISTANT: How can I assist you at this moment?

USER: I would like to travel from PHL to IAD, to see the place National Gallery of Art in Washington.

ASSISTANT: May I know your travelling dates?

USER: I want travel on 01/03 and 01/05. Make sure price will be within 200.

ASSISTANT: Sorry no flight found with in your budget. Thank you for contacting us.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: You are welcome.