You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Lisa Hall, want to travel from SFO to DEN. Please help me in booking my ticket.

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: Sure, my travelling dates are from 01/19 to 01/21.

ASSISTANT: Ok, please wait a  moment to check flight availability.

USER: Sure.

ASSISTANT: UA airlines running a flight in your route with connection 1 and the fare of the ticket is 800. Shall I proceed with booking?

USER: Please proceed.

ASSISTANT: Ok Lisa Hall, your ticket booking has done and the flight number is 1008.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us, have a great journey.