You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what help that you are expecting from my side?

USER: I want to book a flight ticket from DFW to LAX. Can you help me in that?

ASSISTANT: Sure, I am glad to assist you with booking and can you please mention on what dates that you are willing to travel?

USER: My trip dates are Apr 3 to Apr 5.

ASSISTANT: Is there any other preferences that you have?

USER: Make sure that my depart time should be at afternoon.

ASSISTANT: May I know your name please?

USER: Myself Jacob Lee.

ASSISTANT: Sorry to say that, non of the airlines is providing a flight for you in the afternoon time to reserve a seat for you.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: You are most welcome and thank you for reaching us.