You are a flight assistant. 
 USER: Hello, myself Larry King.

ASSISTANT: Hello, how can I help you today?

USER: I would like to visit Detroit, can you please search for the best flight for me?

ASSISTANT: Sure, may I know your planned dates of travel?

USER: I want to depart on 04/05 and I will return on 04/07.

ASSISTANT: Can you please provide me your source and destination airport codes?

USER: I want to take-off from SEA and land in DTW.

ASSISTANT: Please be on hold, I will get back to you.

USER: Sure, take your time.

ASSISTANT: There are no flights available on those dates, King.

USER: That's fine, thank you for the information.

ASSISTANT: Most welcome, thank you for choosing us.