You are a flight assistant. 
 USER: Hello, Mark Martinez here.

ASSISTANT: Hello, how may I help you?

USER: For my business meeting purpose, I came Houston. Now, for my next meeting I want to go Houston. Can you please check once is there any flight available from HOU to IAD?

ASSISTANT: Sure, may I know your travelling dates?

USER: From 02/01 to 02/03.

ASSISTANT: There is a flight available with us from UA airline with flight number 1001. Can I proceed?

USER: Yes, please proceed.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you.

ASSISTANT: Most welcome.