You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please book a ticket from SFO to IAD?

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

USER: My travelling dates are Aug 7 and Aug 9.

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

USER: Please reserve on the name of Frank Hall.

ASSISTANT: Let me know your connection limit?

USER: I want single connection.

ASSISTANT: Do you have any other requirements?

USER: No.

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

USER: Ok.

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

USER: Ok, Thank you.

ASSISTANT: Thank you for choosing us.