You are a flight assistant. 
 USER: Hello, I am Katherine Brown.

ASSISTANT: Hello, how can I serve you?

USER: Could you help me in booking a direct flight from Los Angeles, CA - LAX?

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

USER: My trip dates are from 07/22 to 07/24.

ASSISTANT: May I know your destination airport code?

USER: I want to head to Houston, TX - HOU.

ASSISTANT: Sorry, we did not found any direct flight based on your given preferences.

USER: It's ok, I will check out with the another airlines.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.