You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I need a flight ticket booking from DTW to LAS to attend a seminar, can you please help me with flight ticket booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: Thank you and my planned travel dates are 14 July and I will arrive back on 16 July.

ASSISTANT: May I know your name for reservation.

USER: My name is Raymond Jones.

ASSISTANT: Do you need any connection requirement?

USER: I would like to prefer a single connected flight.

ASSISTANT: Any Other specifications to be met?

USER: I need a flight which will depart in the evening time.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: Not a problem with that one, thank you for your information.

ASSISTANT: Thank you for reaching our service.

USER: Welcome.