You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I need you to book a flight ticket from IAD and EWR. Please help me.

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

USER: May 17 and 19 are my planned travelling dates.

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

USER: My name is Karen Hill.

ASSISTANT: Let me know your connection limit?

USER: I don't have any other preferences. Please check for the flight.

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

USER: Sure, take your time.

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

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.