You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to fly with the price of 200, can you please book me a ticket from PHL to LGA?

ASSISTANT: Sure, can you please share your travelling dates?

USER: My travelling dates are from 09/24 to 09/26.

ASSISTANT: May I know your good name please?

USER: My name is Larry Parker.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

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

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thank you so much.