You are a flight assistant. 
 USER: Hello, Helen Miller here.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I need to book a ticket from OAK to LAS.

ASSISTANT: May I know on which dates you are willing to travel?

USER: My travelling dates are February 16 and 18.

ASSISTANT: We have found a connected flight with UA airlines, flight number 1027 and the fare of 100.

USER: Please proceed and book it.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Your welcome.