You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Amy Clark.

ASSISTANT: How can I aid you for the day?

USER: I need to book a flight ticket from SFO to LAS, Can you please help me for booking?

ASSISTANT: Sure, I am here to help you with that. May I know your travelling dates, please?

USER: I would like to travel on 08/30 to return on 09/01.

ASSISTANT: Do you have any other specifications?

USER: I would be return on afternoon.

ASSISTANT: There are no flights on this route as per your travel dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us, have a great day.