You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Lisa Scott.

ASSISTANT: How may I aid you?

USER: I want to book a flight ticket from BOS to ORD. Can you help me in that?

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

USER: My trip dates are Feb 01 to Feb 03.

ASSISTANT: May I know your connection limit please?

USER: I need a connecting flight.

ASSISTANT: Do you prefer either business or economy class?

USER: No.

ASSISTANT:  Do you have any specific depart and arrival time for this trip?

USER: My depart time should be in the evening.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Lisa Scott, here are no flights available in your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.