You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I need to book a flight ticket from IAD to LAX, can you help me in booking a flight ticket?

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

USER: Sure, my travelling dates are Sep 10 and Sep 12.

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

USER: Karen Wilson.

ASSISTANT: Let me know your connection limit?

USER: I prefer maximum connection.

ASSISTANT: Do you have any other requirements?

USER: I would prefer return time at evening.

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

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for choosing us.