You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I aid you now?

USER: I am Jason Anderson want to book a ticket from IAH to LAS, can you please help me in that?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: Thank you, I am planning to start my journey on June 10th and return on June 12th.

ASSISTANT: Do you have any preferences regarding timings of your journey?

USER: Yes, I want to depart and return in the afternoon.

ASSISTANT: Ok, please wait a moment to check availability of flight.

USER: Ok, make sure that I need a direct flight.

ASSISTANT: Sorry Jason Anderson, no morning flight is available to you on your dates.

USER: Ok, not an issue. I will try with other alternative. Thank you for your information.

ASSISTANT: Apologies, afternoon flight is not available to you. Anyway, thank you for choosing us.