You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in reserving a flight ticket to DTW from LGA?

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

USER: My planned dates are from Jul 21 to Jul 23.

ASSISTANT: Do you have any particular time for departing and returning?

USER: Yes, I would like to depart in the morning.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need a connecting flight.

ASSISTANT: May I know your good name please?

USER: I am Angela Mitchell.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you have any airline preference?

USER: I am comfortable with any airline.

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

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.