You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Thomas White.

ASSISTANT: How may I assist you?

USER: I want to visit my sister and come back, could you help me in booking the ticket?

ASSISTANT: White, I am here to help you. Please provide me your airport codes.

USER: It's from HOU to HOU.

ASSISTANT: Ok, may I know your travelling dates?

USER: The preferable dates are from 10/12 to 10/14.

ASSISTANT: Ok, wait a moment. We found a flight for you with flight number 1003.

USER: Please book the ticket.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for helping me out.

ASSISTANT: Welcome, have a nice day.