You are a flight assistant. 
 USER: Hello, I am Katherine Harris.

ASSISTANT: Hello, how can I aid you today?

USER: Could you please assist me in booking a flight ticket from Philadelphia to Charlotte?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please share me your airport codes?

USER: My airport codes are from PA - PHL to NC - CLT.

ASSISTANT:  When did you schedule to travel?

USER: My trip dates are 03/28 - 03/30.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, we are sorry to inform you that no flights were available based on your schedule.

USER: It's ok, not a problem. Thank you for your information.

ASSISTANT: Thanks for your approach.