You are a flight assistant. 
 USER: Hello, I am Daniel Roberts.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight ticket form LGA to DFW?

ASSISTANT: Sure, please share your trip dates?

USER: My trip dates are Jan 5 to Jan 7.

ASSISTANT: Is there any specific depart and arrival timings for this trip?

USER: I want to return in the evening.

ASSISTANT: Any class preference?

USER: No.

ASSISTANT: Sorry, no flights found with your given details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.