You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I am planning to go Oakland to celebrate my brothers's daughter birthday. Can you do the reservation?

ASSISTANT: Sure, let me know your travelling dates?

USER: Trip dates are 12/04 and 12/06.

ASSISTANT: What are your airport codes?

USER: My airport codes are ATL-OAK.

ASSISTANT: May I know your good name please?

USER: Richard Evans here.

ASSISTANT: Thanks for providing your name, no flights found with your requested dates.

USER: No issue, Thank you.

ASSISTANT: Thanks for approaching us.