You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Helen Campbell here.

ASSISTANT: How can I assist you?

USER:  I would like to visit New York to attend a business meeting in JFK, can you help me to make a flight reservation from LAS?

ASSISTANT: Sure Helen, can I know the travel dates please?

USER: Actually, I am planning to travel on 12/31 and return back to my place on 01/02.

ASSISTANT: Ok, wait a moment please.

USER: Sure, take your own time to search available flight for me.

ASSISTANT: There is a flight in Frontier airline with price 100, can I book it?

USER: You can proceed with this airline, that's exactly matched with my criteria.

ASSISTANT: Your ticket has been booked with flight number 1020.

USER: Thanks for helping me to book a flight ticket and great service.

ASSISTANT: Thank you for approaching us.