You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a ticket from EWR to DFW. Could you book a ticket?

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

USER: Depart date is Sept, 12 and return by Sept, 14.

ASSISTANT: On what name, do I need to reserve your ticket?

USER: I am Stephen Young.

ASSISTANT: Let me know your connection limit?

USER: I would prefer connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I prefer normal-cost airlines.

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

USER: Thank you.

ASSISTANT: Thank you for choosing us.