You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I need to book a plane to Houston, TX - HOU from New York, NY - LGA.

ASSISTANT: Can you please provide me your journey dates?

USER: My depart date will be on Mar 16 and return on Mar 8. I will be return on Mar 18.

ASSISTANT: OK, please wait I will let you know .

USER: Please make sure that price should not exceed 500 with one connection.

ASSISTANT: Thank you for waiting. Sorry, no flights are available on your requirement.

USER: OK, no issue. Thanks for your response.

ASSISTANT: Thank you for availing us, have a great  day. May I know your good name?

USER: Joshua Green.

ASSISTANT: Thank you.