You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I'm Kimberly Nelson have to attend my business meeting in Houston, can you help me to book a ticket from CA - LAX to TX - IAH?

ASSISTANT: Sure, could you please provide me your journey dates?

USER: Yes, my travel dates are 08/14 and 08/16.

ASSISTANT: Please wait, I will check the availability and come back to you.

USER: OK.

ASSISTANT: Thank you for waiting, I am sorry to say that there is no flight on your root.

USER: OK, thank you.

ASSISTANT: Thank you for choosing us, have a good day.