You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Melissa Perez. I am planning to watch a fashion fest, could you book a ticket from BOS to PHL?

ASSISTANT: Sure, may I know on which dates you would like to travel?

USER: My travelling dates are 09/03 and 09/05.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: That's ok. Thank you for the information.

ASSISTANT: Thank you, have a good day.