You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid you?

USER: Can you help me in booking my flight ticket from PHL to BOS?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates will be July 25th to July 27th.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Any other preferences?

USER: I prefer a business class flight which should return in the afternoon.

ASSISTANT: May I know your name?

USER: I am Patrick Rodriguez.

ASSISTANT: Sorry, there are no flights found with your data.

USER: Its ok, thank you.

ASSISTANT: Thank you.