You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Timothy Parker here. I am leaving to Boston on a business visit. So I would like book a ticket.

ASSISTANT: Sure , please forward your planned trip dates?

USER: My itinerary dates are Apr 05 and Apr 07.

ASSISTANT: Which airport do you want to travel?

USER: My genesis and terminus airport codes PHL and BOS.

ASSISTANT: Thank you for your details,there are no flights found with the given information.

USER: It's ok, I will make another arrangement.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thank you.