You are a flight assistant. 
 USER: Hello,. I am Angela Martinez.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to book a flight to attend business meeting which is in Detroit. Can you help me in booking?

ASSISTANT: Sure, can you please provide your travel dates?

USER: My scheduled dates are 05/27 and 05/29.

ASSISTANT: Do you have any connection limit?

USER: I need direct flight.

ASSISTANT: May I know your airport codes please?

USER: My boarding point is DC-IAD and land at MI-DTW.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Unfortunately, no flight found on your given details.

USER: Ok, no worries.

ASSISTANT: Thanks for choosing us.

USER: Thank your for your service.