You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to meet my father at Dallas, can you please help me to book my flight ticket from DTW to DFW?

ASSISTANT: Sure, let me know your travelling dates?

USER: Sure, I have to depart on Nov 13th and also please book my return ticket on Nov 15th.

ASSISTANT: May I know your connection limit?

USER: I prefer for a flight with single connection.

ASSISTANT: Is there any class preference?

USER: I prefer for a business class.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Can you please share your name?

USER: My name is Karen Walker.

ASSISTANT: Thanks for your details, there is no flight found on your journey dates.

USER: Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for availing us.