You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Paul Wright here.

ASSISTANT: How can I help you?

USER: I need a connecting flight to visit New York. Can you book it?

ASSISTANT: Sure, can you please help me with your airport codes?

USER: My airport codes will be from DCA to EWR. See that the price of the flight ticket is below 200.

ASSISTANT: Ok, may I know your travel dates please?

USER: My travel dates for my journey would be from 10/14 to 10/16.

ASSISTANT: Sorry, there are no flights available with ticket fare under 200.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you so much for choosing us.