You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in booking my flight ticket from BOS to ORD?

ASSISTANT: May I know your journey dates?

USER: My travelling dates are Dec 24 and Dec 26.

ASSISTANT: Do you need a connecting flight?

USER: I need connecting flight.

ASSISTANT: May I know your name?

USER: Myself Brandon Edwards.

ASSISTANT: I am sorry to say, there are no flights available for your journey.

USER: Thanks for checking.

ASSISTANT: Thank you for reaching us.