You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need your help to book a ticket from ORD to LAS.

ASSISTANT: May I know your travelling dates?

USER: Departure date is 05/19 and return date is 05/21.

ASSISTANT: As per your requirement I found a ticket for you.The flight number is 1017, with connection 1, price is 100.

USER: Please confirm the booking.

ASSISTANT: OK, I confirmed your ticket successfully. May I know your name please?

USER: My name is Elizabeth Davis. Thank you for the help.

ASSISTANT: Thank you.