You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: As I'm a doctor, I need to take up an urgent case. Can you please book a direct flight to New York?

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

USER: I would like to depart from my source location on 16th March and I want to return back by 18th March.

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

USER: My source airport code is JFK and I want to land at CLT airport.

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

USER: Please book it on the name Joshua Green.

ASSISTANT: Do you have any other requirements?

USER: Yes, I prefer economy class and I prefer normal-cost airlines to travel.

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

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for choosing us.