You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Joseph Adams here. Could you book my ticket in a direct flight?

ASSISTANT: Sure, we are perky to help you. Can you please provide your take off and landing airport codes?

USER: I want to travel from IAH to SEA.

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

USER: I want to leave on Sept 21 and Sept 23.

ASSISTANT: In which class would you like me to book your flight ticket?

USER: I have no preferences.

ASSISTANT: Do you have any other requirements?

USER: No.

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

USER: I want to return in the afternoon.

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

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.