You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Margaret Hill.

ASSISTANT: How can I assist you?

USER: Can you help me in booking from LAX to PHL?

ASSISTANT: Sure, I am happy to help you. When are you willing to travel?

USER: My travelling dates are from Aug 5 to Aug 7.

ASSISTANT: Is there any connection limit for you?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your specific depart and arrival timings?

USER: My return time is evening.

ASSISTANT: Do you prefer any specific class to travel?

USER: No.

ASSISTANT: Is there any other specifications to be met?

USER: No.

ASSISTANT: Thanks for providing details, no flights are available based on your requirements.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for choosing us.