You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you for the day?

USER: I am planning to book a flight from HOU to reach PHL, will you help me in booking?

ASSISTANT: Sure, I will help you with that. May I know your preferable travel dates?

USER: My planned dates are on Nov 19th to 21st.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am okay with any class.

ASSISTANT: Can I know your connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: Sure, I am Sharon Evans.

ASSISTANT: Sorry to tell you that, there are no flights found on this route as per your given details.

USER: No worries, thank you.

ASSISTANT: Thank you for reaching us, have a great day.