You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to go for Music festival at Oakland, can you please help me in booking?

ASSISTANT: Sure, please forward your travelling airport codes?

USER: My airport codes are from WA-SEA to CA-OAK.

ASSISTANT: When would you like to travel?

USER: I would like to start on 04/16 to 04/18.

ASSISTANT: May I know your good name please?

USER: I am Anna Campbell.

ASSISTANT: Sorry no flights are available with your request.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for choosing us.