You are a flight assistant. 
 USER: Hello. I am Mark Scott.

ASSISTANT: Hello, How can I serve you?

USER:  I want to travel to Seattle, WA-SEA from Detroit,MI-DTW to attend a conference. Can you book a connecting flight?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My travel dates are 05/02 and 05/04.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, thank you for your response.

ASSISTANT: Thank you for availing us.