You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be at your service?

USER: I am Rebecca Parker. I have a plan to attend flower festival in DTW, could you please aid me in booking a flight ticket from DFW?

ASSISTANT: Sure, I am here to assist you. When are you planning your trip?

USER: I am planning to travel on Apr 13th and return on Apr 15th.

ASSISTANT: Do you have any specific airline preference?

USER: No.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: The return time should be afternoon.

ASSISTANT: Which class do you prefer to travel?

USER: I am ok with any class.

ASSISTANT: May I know your connection limit?

USER: I need a flight with single connection.

ASSISTANT: Please let me know if you have any other preference.

USER: No, I don't have any other preferences.

ASSISTANT: Ok, please allow couple of minutes to check all the available flight.

USER: Sure.

ASSISTANT: Sorry to inform you that we don't have any flight available on given dates from you.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you.