You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me to book a flight from BOS to LAS?

ASSISTANT:  Sure, may I know the travelling dates?

USER: I want to travel on June 15 and need to return on June 17.

ASSISTANT:  Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Are there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Myself Justin Mitchell.

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

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for opting us.