You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of service you are expecting from us?

USER: Carolyn Miller here, I have an invitation to attend a seminar to be held in Independence Hall. Can you please help me to book a ticket from BOS to PHL?

ASSISTANT: Sure, how much you can effort for a ticket?

USER: 500.

ASSISTANT: When did you plan to travel on?

USER: My travelling dates will be on 08/07 to 08/09. I need direct flight.

ASSISTANT: Ok, please wait for a minute. I will check and let you know.

USER: Ok.

ASSISTANT: We hardly tried to provide you flight, unfortunately no flights are available to that locations.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.