You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

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

USER: May, 21 and May, 23 are my journey dates.

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

USER: Mary Wilson here.

ASSISTANT: Let me know your connection limit?

USER: I would prefer single connection.

ASSISTANT: Do you have any other requirements?

USER: I need to travel in economy class.

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

USER: Sure.

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

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for choosing us.