You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are 13 and 15 of Dec.

ASSISTANT: On which name should I reserve the flight ticket?

USER: I am Jessica Anderson.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart in the afternoon with a normal cost airline.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for reaching us.