You are a flight assistant. 
 USER: Hello, I'm Cynthia Walker.

ASSISTANT: Hello Walker, how may I help you?

USER: My father got promotion with in two months of time in BMW company and now he became senior manager , so they are giving party to all the employees, my father want to take me with him, so can you book a flight ticket for me to AUS from my home town IAD?

ASSISTANT: Sure, I am glad to help you. May I know your itinerary dates?

USER: Ok, my preferred trip dates are 06/06 and 06/08.

ASSISTANT: Please hold on for a while.

USER: Ok, make it fast.

ASSISTANT: Sorry, no flight is available on your route.

USER: That's fine, thank you for your response.

ASSISTANT: Thank you for reaching us.