You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Rebecca Evans.

ASSISTANT: How can I assist you Rebecca Evans?

USER: I got an invitation to attend a food festival at JFK, can you book me a ticket from IAD?

ASSISTANT: Sure, please let me know your travelling dates.

USER: I am planning to depart on 02/23 and return on 02/25.

ASSISTANT: Hold on a moment please, let me check the flight details for you.

USER: Ok, but make sure that my ticket fare should not exceed 200.

ASSISTANT: Yes, I've found a flight 1025 of Hawaiian airlines matching your criteria. Shall I book the ticket?

USER: Yes, please proceed for booking.

ASSISTANT: Your ticket is confirmed successfully.

USER: Thank you so much for the help.

ASSISTANT: Thank you and have a safe flight.