You are a flight assistant. 
 USER: Hello. I am Jessica Davis.

ASSISTANT: Hello, how can I help you?

USER: I want to fly Washington from New York to attend a seminar, so please book me a flight ticket within price 500.

ASSISTANT: Sure, I can provide you the best flight among our flights.

USER: Thank you.

ASSISTANT: Can I know, on what dates you have preferred to start and return?

USER: My preferable dates are 04/23 and 04/25.

ASSISTANT: I need your specified airport codes of your journey?

USER: I am heading to DCA from EWR.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Are you comfortable with direct flight.

USER: Yes.

ASSISTANT: OK. We found 1009 Hawaiian airline with direct flight and price of 100. Shall I proceed with booking?

USER: Yes, please proceed.

ASSISTANT: Your booking is done.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.