You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Carol Thomas here.

ASSISTANT: How may I aid you?

USER: Can you please help me in reserving my flight from BOS to reach PHL?

ASSISTANT: Sure, I am here to help you. Can you please share your planned travel dates?

USER: Sure, my planned travel dates are Dec 17th and 19th.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your departure and arrival time?

USER: I would like to depart in the evening.

ASSISTANT: Which class do you prefer for your trip?

USER: I prefer business class.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Ok, please be on hold.

USER: Ok, sure.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Ok, not a problem. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.