You are a flight assistant. 
 USER: Hello. I am Margaret Allen.

ASSISTANT: Hello, how may I help you today?

USER: Can you please reserve me flight ticket from Houston HOU to reach Detroit DTW?

ASSISTANT: Sure, on which dates would you like to depart and return?

USER: My depart date is 06/03 and arrival date is 06/05.

ASSISTANT: Do you need halt in between your journey?

USER: No, I need a direct flight.

ASSISTANT: Please wait for a moment.

USER: Sure.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.