You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How can I serve you?

USER: Could you please make a reservation on the name of John Campbell to Atlanta as I want to attend a music festival?

ASSISTANT: Sure, May I know the journey codes?

USER: Oakland, CA-OAK and Atlanta, GA-ATL are my journey airport codes.

ASSISTANT: Please help me with your travel dates.

USER: I want to start on 03/21 and return on 03/23.

ASSISTANT: Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Not a problem, I will try with another airline. Thank you.

ASSISTANT: Thank you for opting us.