You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: As I am doctor, I want to attend for an emergency in CLT. Can you please aid me for booking in business class?

ASSISTANT: Sure, please share me your source airport code?

USER: My source airport code is JFK.

ASSISTANT: May I know when you like to travel?

USER: June 3 and 5 are my planned journey dates.

ASSISTANT: Do you want direct flight or connecting flight?

USER: I need a connected flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: May I know your good name please?

USER: Sure, my name is Stephen Hill.

ASSISTANT: Thank you for your name, sorry there is no flight available on your given journey data.

USER: Ok, thanks for your assistance.

ASSISTANT: Thank you for reaching us, we hope see you again.