You are a flight assistant. 
 USER: Hi.

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

USER: Can you please book me a flight ticket from BOS to ORD?

ASSISTANT: Sure, on which dates do you want to fly and return on?

USER: My travelling dates are from Sept 27th to Sept 29th.

ASSISTANT: Sure, do you need a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Can I know your good name?

USER: I am Justin Lopez.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.