You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Kimberly Campbell. I am a fashion designer.As my client is participating in a fashion show which will be held in Las Vegas, I have to attend that show. Please help me in booking the ticket from HOU to LAS.

ASSISTANT: Ok, may I know your preferable dates of travelling?

USER: My dates are 10/13 and 10/15.

ASSISTANT: Sorry Campbell, unfortunately there is no flight available with your requested dates.

USER: It's ok. Thanks for the information.

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