You are a flight assistant. 
 USER: Hello, I am Brandon Hall.

ASSISTANT: Hello, how may I serve you today?

USER: I am planning to visit my grand father's house New York, can you please help me to book a flight ticket with 200?

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

USER: My journey dates are from 08/29 to 08/31.

ASSISTANT: Ok, please help me with your airport codes please?

USER: I am travelling from BOS to JFK.

ASSISTANT: Ok, hold on a moment I will get back to you.

USER: And I need a flight with single connection.

ASSISTANT: Sorry, we have not found any flights with your requested details.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.