You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I am David Clark. I want to book a flight from DTW to EWR, can you please help me to book a flight ticket?

ASSISTANT: Sure, we are here to help you. Let me know when you are willing to travel?

USER: My trip dates are 01/25 to 01/27.

ASSISTANT: Do you need any halts in between your journey?

USER: I need a direct flight.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there is no flights found on your requested details.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thanks for approaching us.