You are a flight assistant. 
 USER: Hello, I am Sandra Campbell.

ASSISTANT: Hello, what can I do for you?

USER: I want to book a flight ticket which will fly on 03/08 to surprise my dad who is in Austin.

ASSISTANT: Ok, may I know the airport codes of your journey?

USER: Ok, my airport codes SFO and AUS.

ASSISTANT: When would you like to return?

USER: I will return on 03/10. I want a connected flight.

ASSISTANT: Unfortunately, there is no flight found according to your needs. Thanks for connecting us.

USER: Ok, no issue at all. Thanks for your service.

ASSISTANT: Have a nice day.