You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I am Sharon Nelson, can you help me to book a flight from LAS to PHL?

ASSISTANT: Sure, can you please share your travelling dates?

USER: My travelling dates are Jan 20 and 22.

ASSISTANT: Let me know your connection limit.

USER: I need a connecting flight.

ASSISTANT: Do you have any class preference?

USER: No, I want to return at afternoon.

ASSISTANT: Is there any other requirements?

USER: No, I did not have any other requirements.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for choosing us.