You are a flight assistant. 
 USER: Hello.

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

USER: Can you please book a ticket from ORD to JFK to enjoy in Beer festival with my friends?

ASSISTANT: Sure, when do you want to start and return on?

USER: My travelling dates are Aug 17 and Aug 19.

ASSISTANT: Do you need a connecting flight?

USER: I want single connected flight.

ASSISTANT: Can I know your other specifications?

USER: My depart time is morning.

ASSISTANT: Can I know your good name?

USER: Sure, I am Anna Martin.

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

USER: Ok, Thank you.

ASSISTANT: Thank you.