You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be of your service?

USER: I am planning to attend graduation day of my sister, can you please help me in reserving a flight ticket?

ASSISTANT: Sure. Can you please share your journey details?

USER: Sure, I want to book a ticket from Houston, TX-HOU on 12/08 to New York, NY-LGA on 12/10.

ASSISTANT: Do you have any specifications?

USER: Yes, price should be 200 with one connection.

ASSISTANT: May I know your name please?

USER: I am Ruth Nelson.

ASSISTANT: Sorry to say that we have not found any flights according to your given details.

USER: Ok, thank you for your response.

ASSISTANT: Thanks for choosing us.