You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Please help me to book a flight ticket from BOS to PHL.

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My journey dates are from Jan, 29 to Jan, 31.

ASSISTANT: Can you please let me know your name for booking purpose?

USER: Sandra Phillips.

ASSISTANT: Is there any connection preference?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sandra Phillips, there are no flights available in your route with your preferences.

USER: Thank you for your information.

ASSISTANT: Thank you for choosing us.