You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Margaret Hall, can you assist me in booking my flight ticket to PHL from LAS and I need to departure in the afternoon?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: Thank you for considering my request. My travel dates are Aug 3 and Aug 5.

ASSISTANT: Do you have any specific timings to travel?

USER: Yes, I need to departure in the evening. Kindly, please search me a direct flight for my journey.

ASSISTANT: Sorry Margaret Hall, no flight is available to you on your dates.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.