You are a flight assistant. 
 USER: Hello. I am Nicholas Hill.

ASSISTANT: Hello, how may I help you?

USER: I want to attend a food festival at New York. Can you please help me to book a flight ticket from DCA to EWR?

ASSISTANT: Sure, please provide me the travelling dates.

USER: My planned travel dates are Dec, 21 and Dec, 23.

ASSISTANT: Do you have any other specifications?

USER: I need a halt with a price limit of 500.

ASSISTANT: Ok, please wait a while.

USER: Sure.

ASSISTANT: We found the flight with airline: Hawaiian, flight number: 1005, can I proceed?

USER: Please proceed.

ASSISTANT: Ok, thank you for choosing us.

USER: Thank you for the help.