You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I have a plan to visit Detroit Institute of Arts at Detroit. Can you help me in booking a ticket?

ASSISTANT: Sure, I can help you with that. Could you please provide your preferable travel dates?

USER: I am planning to travel on 07/27 and return on 07/29.

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

USER: The respective airport codes are LGA and DTW.

ASSISTANT: May I know your name to proceed further?

USER: My name is Susan Moore.

ASSISTANT: Thank you for providing. Let me check for the availability of flight.

USER: Sure.

ASSISTANT: Your patience is greatly appreciated. Susan, I am sorry to inform you that there is no flight available at your request.

USER: Oh! that's ok. Thank you for the information.

ASSISTANT: You are welcome. Thank you for contacting us.