You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please make a reservation in business class to attend a event in Philadelphia?

ASSISTANT: Let me know your travelling dates.

USER: My journey dates are on Dec 12th and 14th.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: Do you have any preference?

USER: I prefer connecting flight. And my return flight time should be in the afternoon.

ASSISTANT: Can I know your travelling codes?

USER: My airport codes are, IAH to PHL.

ASSISTANT: Let me know your name.

USER: My name is Gregory Adams.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you.