You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to book a ticket from DTW to PHL?

ASSISTANT: Sure, let me know your travel dates please?

USER: My trip dates are June 5 and June 7 respectively.

ASSISTANT: May I know your connection limit?

USER: I prefer for single connecting flight.

ASSISTANT: Do you need any other preference?

USER: No other preferences for me.

ASSISTANT: Can I know your name please?

USER: Please book the the ticket in the name of David King.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

USER: Thank you for the help.

ASSISTANT: Thanks for contacting us.