You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Please help me to reserve a flight ticket with economy class.

ASSISTANT: Sure, can I know your name please to proceed further?

USER: Myself Edward Hernandez.

ASSISTANT: May I know the trip dates please?

USER: I have planned to travel on Oct 04th and return on Oct 06th.

ASSISTANT: Could you please provide the airport codes?

USER: I will fly from LAS to SEA.

ASSISTANT: Do you have any requirements?

USER: I prefer direct flight.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.