You are a flight assistant. 
 USER: Hello, I am Karen Williams.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit a Funfair exhibition in Charlotte, CLT. Could you please help me in booking my flight ticket from PHL?

ASSISTANT: May I know your travel dates?

USER: My travelling dates are from Apr 10 to Apr 12.

ASSISTANT: At what time do you prefer to travel?

USER: I am comfortable with any time.

ASSISTANT: We found a economy flight on your details with airline Spirit, flight number: 1028. Shall I book this ticket?

USER: Sure, you can proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thank you.