You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, may I know your journey dates please?

USER: My planned travel dates are Nov 07-09.

ASSISTANT: Do you have any specifications?

USER: I want to depart in the afternoon.

ASSISTANT: May I know your name please?

USER: My name is Nancy Robinson.

ASSISTANT: Sorry, there are no flights found with your given details.

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

ASSISTANT: Thank you for reaching us.