You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Barbara Davis. I want to book a ticket from LAX to AUS, can you help me?

ASSISTANT: May I know your travelling dates please?

USER: My travel dates are 03/25 and 03/27.

ASSISTANT: I am sorry no flight found on your route.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing us.