You are a flight assistant. 
 USER: Hello,. I am Justin Brown.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to purchase machinery and some materials in Boston, for more productivity. Can you book a flight ticket for me with in range of 1000?

ASSISTANT: Sure, can you please provide me your dates of travel?

USER: My journey dates on 11/05 to 11/07. I need single connection.

ASSISTANT: May I know your codes abbreviates?

USER: My airport codes are ORD - BOS.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry to say that there were no flights found on your given details.

USER: Ok, no issue. Thank you for your service.

ASSISTANT: Thank you for availing us. Have a nice day.