You are a flight assistant. 
 USER: Hello, I am James Moore.

ASSISTANT: Hello. Do you want me to help you with anything?

USER: Please book a flight ticket from LAS - HOU.

ASSISTANT:  Sure, can you please give me your planning dates?

USER: And I would depart on 01/04 and arrive on 01/06.

ASSISTANT: Sure, give me a minute.

USER: The trip is regarding a business meeting.

ASSISTANT: Sorry to say that there is no flight  found.

USER: Ok, not a problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you.

ASSISTANT: Welcome.