You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Will you help me to book a flight ticket from LAS to SFO?

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

USER: I will start on Aug, 11 and return on Aug, 13.

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

USER: Mark Nelson.

ASSISTANT: Let me know your connection limit?

USER: I would prefer single connection.

ASSISTANT: Do you have any other requirements?

USER: No, thanks.

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

USER: That's ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.