You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Michelle Taylor here, I want to reserve my ticket to visit Seattle, can you please help me to book a ticket from AUS to SEA?

ASSISTANT: May I know your dates of travel?

USER: Sure, my dates of journey is from 06/27 to 06/29. Please make sure that the price limit is 200.

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

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thank you for your service.

ASSISTANT: It's my pleasure.