You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to attend music concert at IAD, can you please help me with booking a flight ticket from DTW?

ASSISTANT: Sure, may I know your travel dates?

USER: I would like to take off on Jan 10 and return on Jan 12.

ASSISTANT: May I know your connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have class preference?

USER: No.

ASSISTANT: May I know your good name please?

USER: My name is Jonathan Harris.

ASSISTANT: Is there any time concern?

USER: I am fine with any timings.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry, there is no flight on your required dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for opting us.

USER: You are welcome.