You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you help me in booking from DTW to IAD, as there is a conference meeting to attend?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are Dec 3 to Dec 5.

ASSISTANT: Do you need any connections?

USER: I am looking for a stopover flight which return in morning.

ASSISTANT: Are there any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: Reserve under the name Benjamin Smith.

ASSISTANT: Sorry, there is no flight found with your details.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching us.