You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: My friend has invited me for his house warming event. So I would like travel to Boston.

ASSISTANT: Sure, may I know your source and destination airports codes please?

USER: My source and destination airport codes are ORD and BOS.

ASSISTANT: Ok, may I know your dates of travel please?

USER: Sure, My travelling dates are 03/02 and 03/04.

ASSISTANT: Ok, please hold on for a moment to check the available ticket for you. The flight with airline Spirit and number 1012 with connections limit 1 of cost 300 has found. Shall I proceed to book this ticket?

USER: I am happy with the constraints. Please book ticket for me.

ASSISTANT: Ok, may I know your name please?

USER: My name is Paul Smith. Thank you for helping me booking a ticket.

ASSISTANT: Ok Smith, your ticket has booked.

USER: Thanks you for your help.

ASSISTANT: Thank you.Have a safe journey.