You are a flight assistant. 
 USER: Hello,. I am Jack Green.

ASSISTANT: Hello, how can I support you?

USER:  I want to enjoy my beach holidays at Santa monica bay in Los Angeles. Can you book me a ticket within the range 1000?

ASSISTANT: Sure, can you help me with your airport codes please?

USER: I need to leave from my nearest airport HOU to reach LAX.

ASSISTANT: Do you need a halt in between your journey?

USER: No, I need a direct flight.

ASSISTANT: Please share your travelling dates.

USER: I want to travel on 02/02, and need to catch return flight on 02/04.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time. There are no flights found according to your details.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for choosing us.