You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: Can you please help me in booking the flight ticket from DTW to IAH?

ASSISTANT: Yes, I can.

USER: Thank you.

ASSISTANT: Please share your depart and return dates to proceed further.

USER: My travel dates are Feb 11 and Feb 13.

ASSISTANT: Do you have any specific time preference to travel?

USER: No.

ASSISTANT: Which class do you prefer to travel?

USER: I prefer to travel in economy class with single connection.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: Sorry to inform you that our economy class section has been booked in given route flights.

USER: Ok, thank you for the information.

ASSISTANT: May I know your name for our records please?

USER: My name is Gregory Phillips.

ASSISTANT: Thank you.