You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I need your help in booking a flight ticket.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your preferable dates of travelling?

USER: I am willing to start my journey on May 8 and end on May 10.

ASSISTANT: Ok, may I know your regional airport codes for booking?

USER: AUS and LAS are the in and out airport codes.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a direct flight.

ASSISTANT: Any other preferences do you have?

USER: I am comfortable with the above mentioned preferences.

ASSISTANT: May I know your name please?

USER: Jeffery Jackson is my name.

ASSISTANT: We regret to inform you that, there are no flights moving to your region with your requested preferences.

USER: Oh! I haven't expected this. That's ok. Thank you.

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