You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me to book a flight from HOU to PHL?

ASSISTANT: Sure, could you please share your journey dates?

USER: Sure, I want to travel on Dec 5 and need to return on Dec 7.

ASSISTANT: Please let me know your connection limit?

USER: I am looking for a flight with single connection.

ASSISTANT: Are there any more specifications?

USER: I prefer business class to travel.

ASSISTANT: May I know your good name to proceed further?

USER: Donald Miller here.

ASSISTANT: We found a connecting flight 1003 from Frontier airline with a fare 600. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been confirmed in business class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.