You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your good name please?

USER: Carolyn Lee here.

ASSISTANT: Ok Carolyn, how can I help you?

USER: I would like to book a ticket from EWR to DEN. My travelling dates are from 04/08 to 04/10.

ASSISTANT: Ok, please wait for a minute.

USER: Make sure that the price limit should be 200.

ASSISTANT: Yes, there is a flight 1005 of Spirit airlines which matches with your details. Shall I book the ticket?

USER: Yes proceed.

ASSISTANT: Ok, your ticket is booked. Have a safe journey.

USER: Thank you for your service.

ASSISTANT: Welcome.