You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Can you please help me to book a flight ticket from DCA to DTW?

ASSISTANT: May I know your trip dates to travel?

USER: My planned trip dates are Oct 29 to Oct 31.

ASSISTANT: Is there any connection limit?

USER: I need a single connection of flight.

ASSISTANT: Can you help me with your good name?

USER: Nancy Smith.

ASSISTANT: Any more specifications you require?

USER: No.

ASSISTANT: Sorry, there were no flights found with your required dates to travel.

USER: It's ok, thank you.

ASSISTANT: Thank you for opting us.