You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am looking for a flight from SFO to AUS, can you help me in booking?

ASSISTANT: Sure, May I know your travelling dates?

USER: Sure, my planned travel dates are Mar 31 and Aug 02.

ASSISTANT: Let me know your connection limit.

USER: Please look for a direct flight.

ASSISTANT: Please recheck your travelling dates.

USER: Sorry, please change the return date to Apr 02.

ASSISTANT: Ok, May I know your name?

USER: Myself David Harris.

ASSISTANT: Sorry, there are no flights found on your data.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you.