You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: Can you help me to book a flight ticket from DCA to EWR?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My trip dates are 22 to 24 of May.

ASSISTANT: Do you have any other specifications?

USER: I prefer to depart in the evening with a connecting flight.

ASSISTANT: Is there any specifications?

USER: No.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 300 with flight number 1019. Shall I proceed with this flight?

USER: Please book with the name of Richard Nelson.

ASSISTANT: Your booking is done in Hawaiian airlines.

USER: Thanks for helping me.

ASSISTANT: Thank you for choosing us.