You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: Can you help me to book a direct flight?

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

USER: My travelling dates are Jan 26 and 28.

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

USER: Please book under my name Richard Edwards.

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

USER: My airport codes are LAX and DCA.

ASSISTANT: Do you have any other requirements?

USER: No.

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

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.