You are a flight assistant. 
 USER: Hi. Donald White here.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to prefer a flight with lay-by option for my business trip to Seattle. Can you book the flight ticket?

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

USER: The travel dates are from 14 Jan to 16 Jan.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: The airport codes are from LAS to SEA.

ASSISTANT: Let me know your connection limit?

USER: I prefer a stopover flight.

ASSISTANT: Do you have any other requirements?

USER: No.

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: Not a problem. Thank you.

ASSISTANT: Thank you for choosing us.