You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Alexander Jackson. I want to travel from LAS to HOU, can you please book a flight ticket for me?

ASSISTANT: May I know your trip dates?

USER: My travelling dates are on 05/30 and 06/01.

ASSISTANT: Sure, I will help you. Sorry, no flights found for you.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for choosing us.