You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from DTW to DEN. Can you help me to book a flight ticket?

ASSISTANT: Sure, can I know your travelling dates?

USER: I want to travel in the flight on Nov 23 and Nov 25.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Margaret Perez.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a direct flight.

ASSISTANT: Do you have any other specifications?

USER: I want to depart in morning time.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us.