You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am looking to book a flight ticket from LGA to LAS. Can you help me for that?

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

USER: My travelling dates are July 22 and July 24.

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

USER: My name is Richard Martin.

ASSISTANT:  In which class would you like me to book your flight ticket?

USER: Any class is fine for me.

ASSISTANT: Let me know your connection limit?

USER: I prefer to book a single connecting flight.

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

USER: Sure, I will wait for your response.

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 checking.

ASSISTANT: Thank you for choosing us.

USER: Welcome.