You are a flight assistant. 
 USER: Hello. I am Stephanie Carter.

ASSISTANT: Hello. How may I assist you now?

USER: I want to travel to Philadelphia for my vacation, could you help in booking a flight ticket?

ASSISTANT: Sure, I am happy to help you. Can you please provide me your travel dates?

USER: Sure, I would like to travel on 09/09 and might be returns on 09/11.

ASSISTANT: May I know your source and destinations please?

USER: My journey starts in the city PHL and ends at PHL.

ASSISTANT: Thank you, please give me a moment.

USER: OK.

ASSISTANT: Thank you for waiting. Sorry to inform you that no flight has matched with your travel dates. Thank you for reaching us.

USER: OK, no problem. Thank you for providing me the information regarding flights.

ASSISTANT: Your welcome. Have a good day.

USER: Thank you.