You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

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

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My trip dates are Apr 18 to 20.

ASSISTANT: In which class would you like me to book your flight ticket?

USER: I am ok with any class.

ASSISTANT: Let me know your connection limit.

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I need to travel in normal cost airline.

ASSISTANT: May I know your good name please?

USER: Myself Samuel Parker.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Ok.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.