You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I guide you for today?

USER: I am James Wilson. Can you please book a flight ticket from DTW to EWR?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My journey dates are on June 20th 22nd.

ASSISTANT: Do you have any airline preferences?

USER: No.

ASSISTANT: Do you have any class preferences?

USER: I need a flight ticket in economy class.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I need a connecting flight. And my depart time should be in the morning.

ASSISTANT: Sorry, there are no flights available at your request.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.