You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jack Evans.

ASSISTANT: How may I assist you today?

USER: Please search a flight ticket from AUS to SFO. I have an important meeting in my destination place. So, please help me out?

ASSISTANT: Sure, may I know your travelling dates, please?

USER: My travelling dates are Oct 10 and Oct 12.

ASSISTANT: Do you need any specifications for this reservation?

USER: I need my return ticket at evening time .

ASSISTANT: Do you need any connection limit?

USER: I want single connection flight.

ASSISTANT: Sorry, there are flights running on your journey dates.

USER: Ok, fine thank you for your information.

ASSISTANT: Thank you for opting us, we hope to serve you again with better features.