You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you aid me to book a flight ticket from AUS to IAD?

ASSISTANT: Sure, I will help you. Please help me with your planned travelling dates.

USER: My trip dates are Jan 13 and Jan 15 respectively.

ASSISTANT: Do you need a break in between your journey?

USER: I prefer for direct flight.

ASSISTANT: Please help me with your name.

USER: Samantha Martinez here.

ASSISTANT: Do you have any other preferences in your journey?

USER: No.

ASSISTANT: Please allow me a minute.

USER: Ok.

ASSISTANT: Samantha Martinez, I am really sorry to inform you that there are no flight available for your journey.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us. Have a great time.