You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I need to schedule my trip to Philadelphia for attending a business meeting. Can you please help me in booking the ticket from DTW to PHL?

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

USER: Ok, my preferred dates of journey are 02/10 and 02/12.

ASSISTANT: May I know your name to proceed further?

USER: My name is Virginia Brown.

ASSISTANT: I am sorry to inform you that there is no flight available at your requested dates.

USER: Ok, thank you for your help.

ASSISTANT: You are welcome. Thank you for contacting us, have a great day.