You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Gregory Thomas. I want to visit my grand parents in New York, could you help me in booking the ticket?

ASSISTANT: Sure, please provide your travelling details?

USER: It's from LAS to JFK. The dates of travel are from 05/01 to 05/03.

ASSISTANT: I found a flight 1003 of Frontier airlines on your requested dates. Shall I book the ticket?

USER: Please book the ticket.

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

USER: Thank you for helping me.

ASSISTANT: Welcome.