You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I want to book a ticket from IAH to ORD. Could you book a ticket?

ASSISTANT: Sure, could I have your trip dates, please?

USER: Travelling dates are from Aug, 10 to Aug, 12.

ASSISTANT: Do you have any preferences?

USER: I would like to return in the afternoon.

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

USER: My name is Anthony Parker.

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

USER: Thank you.

ASSISTANT: Thank you for opting us.