You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: William Thompson here. Can you book a flight from MCO to LAS for my business trip?

ASSISTANT: Sure, please provide your preferred travelling dates.

USER: My journey dates are from Oct 12th to Oct 14th.

ASSISTANT: Ok, may I know your class preference?

USER: Any class is ok but my depart time is in afternoon.

ASSISTANT: Ok, do you need any stop over in between the journey?

USER: I need a direct flight.

ASSISTANT: Ok, please wait for few minutes.

USER: Please be quick.

ASSISTANT: There are no flights found on your requested dates.

USER: Oh! That's fine. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.