You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I would like to visit Houston Zoo with my friends, please help me in booking a ticket from LAX to HOU.

ASSISTANT: Sure, can you share your trip dates?

USER: My planned trip dates are on Aug 12 and Aug 14.

ASSISTANT: May I know your name?

USER: My name is Rebecca Edwards.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight.

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

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.