You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Paul Davis here.

ASSISTANT: How may I aid you today?

USER: I would like to book a ticket from ORD to AUS, can you please help me with that?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable departure and return dates of travelling?

USER: The travel dates are from 10/31 to 11/02.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I would like to depart during afternoon time.

ASSISTANT: Is there any additional preferences do you want?

USER: No, thank you.

ASSISTANT: Please wait a moment to check the flights on your route.

USER: Ok.

ASSISTANT: We regret to inform you that, there are no direct flights running on your route with your required preferences.

USER: That's ok, thank you for your help.

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