You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to attend business meeting at Washington DC - IAD. Can you help me in booking a flight ticket with single connection?

ASSISTANT: Sure, please provide me your travel details?

USER: Sorry, actually I need a direct flight from Detroit, MI - DTW. My travel dates are as 04/20 and 04/22.

ASSISTANT: Ok, please wait I will let you know.

USER: Sure.

ASSISTANT: Sorry, no direct flights are available.

USER: Ok, thanks for your valuable time spending.

ASSISTANT: Thank you for availing us.

USER: I am Michelle Walker.