You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: Myself Frank Anderson. I want to book a flight ticket from DCA to DTW. Can you please help me in that?

ASSISTANT: Sure, when are you planning to travel?

USER: My trip dates are Aug 02 to Aug 04.

ASSISTANT: Do you need a connecting flight?

USER: I need a connecting flight.

ASSISTANT: In which class do you want to fly?

USER: I am ok with any class.

ASSISTANT: At what time do you want to depart and return on?

USER: My return should be in the afternoon.

ASSISTANT: Thank you for your details, there are no flights found with the given travelling dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.