You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please check for the flights for my journey from PHL to BOS for my journey?

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates are from Dec 12th to Dec 14th.

ASSISTANT: Ok, may I know your class preference?

USER: I need an economy class flight.

ASSISTANT: May I know your name?

USER: Myself Laura Thomas.

ASSISTANT: Do you have any other requirements?

USER: I need 1 connection flight.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: Oh! That's ok. Thank you for checking with availability.

ASSISTANT: You are welcome and have a nice day.

USER: Welcome.