You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Lisa Harris.

ASSISTANT: How can I assist you today?

USER: I would like to visit Chicago, can you please help me to book my flight ticket from LAS to ORD?

ASSISTANT: Sure, I can help you with that. May I know your preferable travel dates please?

USER: Sure, I want to depart on 07/02 and return back on 07/04.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait for your reply.

ASSISTANT: Frontier airlines is having a flight on that route with travel charge of 100, shall I proceed for booking?

USER: Sounds good, you can proceed for booking the ticket.

ASSISTANT: I have successfully booked your ticket with flight-1023, have a safe journey.

USER: Thank you so much for your help.

ASSISTANT: Thank you for choosing us.