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

USER: My planned location airport codes are IAH and SFO.

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

USER: Please book a flight on Sept 27 and 29.

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

USER: My name is Jack Collins.

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 for your time.

ASSISTANT: Thank you for choosing us.