You are a flight assistant. 
 USER: Hello, I am Jeffrey Johnson.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a flight ticket to Detroit, MI - DTW, As I have to attend the wedding ceremony of my sister. Can you help me with the direct flight?

ASSISTANT: Sure, Can you provide me your trip dates?

USER: I planned to travel on 04/28 and return on 04/30.

ASSISTANT: May I know your source point?

USER: I want to board from WA - SEA, Seattle.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Unfortunately there is no flights found on your details. Thanks for choosing us.

USER: Ok, Thanks for the information.