You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, May I know what kind of service you are looking for?

USER: Please book a flight ticket from PHL to HOU?

ASSISTANT: Sure, we are ecstatic to help you. May I know on which dates you are planning to start and return?

USER: My journey dates are Sept 19 and Sept 21.

ASSISTANT: Do you need any flag stop in between journey?

USER: I need a connecting flight.

ASSISTANT: May I know your good name please?

USER: I am Shirley Scott.

ASSISTANT: Is there any other specifications regarding your journey?

USER: I prefer a normal cost airline.

ASSISTANT: Ok, please wait a moment. let me search a flight for you.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for your presence. We hope to serve you again.