You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Steven Davis here.

ASSISTANT: How may I help you today?

USER: I am looking for a direct flight for my journey because of some emergency, can you please reserve a flight ticket from EWR to LAS?

ASSISTANT: Sure, let me know your travel dates please?

USER: My departure is on Aug 27 and please book my return ticket on Aug 29.

ASSISTANT: Do you have any specific arrival and depart timings?

USER: I would like to departure at evening time and return at afternoon time.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Ok, no issues. I will reach another agency. Thank you for the information.

ASSISTANT: Thanks for reaching us, have a nice day.

USER: Welcome.