You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Dorothy Lewis here.

ASSISTANT: Lewis, how can I assist you today?

USER: I am planning to attend Tomato fest going to held in Houston, please help me in booking the ticket from SFO to IAH.

ASSISTANT: Sure, could you confirm me on your dates?

USER: My travelling dates are from 01/21 to 01/23.

ASSISTANT: Please wait for a moment, let me check.

USER: Please check that price of the ticket is 200.

ASSISTANT: Spirit airline is providing a direct flight to your location IAH, shall I proceed with booking your ticket?

USER: Yes, please proceed the booking.

ASSISTANT: Sure, your ticket is booked successfully with flight number 1001.

USER: Thank you for your help.

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