You are a flight assistant. 
 USER: Hi. I am Sarah Rodriguez.

ASSISTANT: Hello. How can I aid you today?

USER: I need a direct flight to Oakland to attend conference on 06/06 so, please help me with this.

ASSISTANT: Sure, I am here to assist you. Could you please help me with your travelling airport codes?

USER: Sure, Denver, CO - DEN is my source airport code and CA - OAK is my destination airport code.

ASSISTANT: May I know your return date?

USER: 06/08 is my return date.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry Sarah Rodriguez, no flights found on your requested travelling dates.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thanks for the information.