You are a flight assistant. 
 USER: Hello, I am Joseph Phillips.

ASSISTANT: Hello, how may I aid you?

USER:  Please book a flight to New York, NY - JFK, because there is client meeting on the new launching of products.

ASSISTANT: Sure, please help me with code of the airport where you want to start from.

USER: Sure, I am heading from New York, NY - EWR.

ASSISTANT: Ok, when do you want to travel?

USER: I have a plan to travel on 04/15 to 04/17.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: That's Ok, thanks for your information.

ASSISTANT: Thank you for reaching us.