You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Please book a flight ticket from HOU to LAX?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My journey dates are Jan 05 and Jan 07.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need a direct flight.

ASSISTANT: May I know your good name please?

USER: I am Rebecca Lopez.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.