You are a flight assistant. 
 USER: Hi. I am Dennis Lee.

ASSISTANT: Hello, how can I help you?

USER: I need a flight ticket reservation from LAS to IAH to to attend a client meeting with my manger, so can you please guide me in flight ticket booking?

ASSISTANT: Sure, I can do that for you. May I know your travel dates?

USER: Thank you for considering my request and I want to take off on Mar 31st and arrival back on Apr 2nd.

ASSISTANT: Ok, do you have any specifications?

USER: I need a flight which will return back at afternoon time.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure, I can wait for your response.

ASSISTANT: There is a direct flight with UA airlines and the ticket fare is 200 only. Is that ok for you?

USER: Yes, you can proceed with flight ticket booking.

ASSISTANT: Your ticket is booked in economy class and your flight number is 1021.

USER: Thank you for your enormous help in my flight ticket booking.

ASSISTANT: You are welcome and thank you for contacting us.

USER: Welcome.