You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to visit Chicago for a business meeting, can you please help me out with booking of a flight ticket from IAD to ORD?

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

USER: Ok, I am planning to move on Apr 19 and please book my return ticket on Apr 21.

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

USER: Please reserve it on the name of Michael Harris.

ASSISTANT: Let me know your connection limit?

USER: I would prefer single connection.

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: Oh! Sad to hear that. Anyway, I will find another alternative. Thank you for the information.

ASSISTANT: Thank you for choosing us.