You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Rebecca Martin. I want to book a flight ticket from DTW to LAX, can you please help me in flight booking?

ASSISTANT: Sure, may I know your dates of journey please?

USER: I want to fly on Oct 01, return on Oct 03.

ASSISTANT: May I know your class preference please?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specifications please?

USER: My depart time should be evening, return time should be morning.

ASSISTANT: Please wait for a mean while.

USER: Sure, I want a direct flight.

ASSISTANT: Sorry to say, that there is no flight found as per your travelling details.

USER: No problem, thank you.

ASSISTANT: You are welcome.