You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donna Campbell.

ASSISTANT: How may I help you?

USER: Actually I want to visit my old friend's home.Can you help me to book a ticket?

ASSISTANT: Sure, can you please tell me your airport codes?

USER: I want to go from NC-CLT to PA-PHL. My travelling dates are 07/28 to 07/30.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: There is a flight Delta and the flight number is 1019 is available.

USER: OK, you can proceed.

ASSISTANT: Ok. Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you.