You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am Ruth Hall here, I want to reserve my ticket from LAS to DTW to visit Detroit, can you please help me out?

ASSISTANT: Sure, can you share your travel dates please?

USER: Ok, my planned dates of journey are from Feb, 02 to Feb, 04.

ASSISTANT: May I know your departure and return time please?

USER: Yes, I need a return time at evening.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Sorry there no flights available in the evening time.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Anyways, thank you for your service.