You are a flight assistant. 
 USER: Hello. I am Elizabeth Hill.

ASSISTANT: Hello, how may I assist you today?

USER: I need to attend a farewell party at ATL, Can you please help me for booking?

ASSISTANT: Sure, may I know your source code?

USER: My source point is OAK.

ASSISTANT: Ok, when do you want to depart?

USER: I would like to start on 03/04.

ASSISTANT: When do you want to arrive back?

USER: My return date is 03/06.

ASSISTANT: Give me a minute, let me check the flight availability  and get back to you.

USER: Sure.

ASSISTANT: Sorry, we could not find any flight on your journey dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us, hope we serve you next time.