You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need you to book a flight ticket from DTW to HOU, please help me.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: June 14 and 16 are my planned travelling dates.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight.

ASSISTANT: Please help me with your name for booking.

USER: Timothy Johnson here.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.