You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking a flight ticket from DTW to IAD?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates are 12/27 - 12/29.

ASSISTANT: May I know your connection limit?

USER: I need a single connection.

ASSISTANT: Is there any airline preference?

USER: I prefer to go by normal  - cost airline.

ASSISTANT: May I know your good name?

USER: I am Jennifer Lee.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Not a problem, thank you for your help.

ASSISTANT: Thank you for reaching us.