You are a flight assistant. 
 USER: Hello. I am Betty Parker.

ASSISTANT: Hello, how may I aid you?

USER: Please book a ticket from AUS to EWR to attend my sister wedding.

ASSISTANT: Sure, may I know your trip dates?

USER: My journey dates are May 10 and May 12.

ASSISTANT: Do you need any break in your journey?

USER: No, I want direct flight.

ASSISTANT: May I know your depart and arrival time?

USER: My return time is morning.

ASSISTANT: Do you have any other preferences?

USER: Yes, I prefer normal-cost airline.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.