You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Kevin Green.

ASSISTANT: How may I assist you?

USER: I have a poker tournament at Las Vegas, can you help me in booking a ticket from IAH to LAS?

ASSISTANT: Sure, can you help me with your travelling dates?

USER: 11/27 and 11/29 are my planned trip dates.

ASSISTANT: Sorry, there is no flight is available for you.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.