You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to visit Charlotte with my friends. Can you do the reservation?

ASSISTANT: Sure, I will help you. Can you please help me with your airport codes?

USER: My airport codes are BOS-CLT.

ASSISTANT: May I know your planned travel dates please?

USER: My journey dates are 07/19 and 07/21.

ASSISTANT: Do you need a connecting flight or a direct flight?

USER: I need a connecting flight with business class.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Paul Wright.

ASSISTANT: Paul Wright, no flights has been found on your planned travel dates.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for choosing us.