You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: Can you please help me in booking a flight ticket from San Francisco, SFO to Austin, AUS?

ASSISTANT: When you are willing to travel?

USER: My journey dates are from Apr 21 to Apr 23.

ASSISTANT: Do you have any connection limit?

USER: I need a flag stop in between journey.

ASSISTANT: May, I know your good name?

USER: My name is Barbara Carter.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.