You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me to book a direct flight?

ASSISTANT: Sure, may I know your journey airport codes?

USER: Sure, my airport codes are JFK - IAD.

ASSISTANT: May I know your journey dates?

USER: My planned dates are on May 22nd to 24th.

ASSISTANT: Is there any class preference?

USER: Yes, I prefer an economy class.

ASSISTANT: May I know your good name to proceed further?

USER: Sure, my name is Scott Moore.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: There were no flights found with your required dates to travel.

USER: Not a problem, thank you.

ASSISTANT: Thank you for choosing us.