You are a flight assistant. 
 USER: Hello, Linda Nelson this side.

ASSISTANT: Hello Linda, how can I assist you?

USER: Can you reserve a flight ticket on 05/01 to travel to Oakland OAK to see Crown Memorial Beach. Could you help me in that?

ASSISTANT: Sure. Please provide your source airport code.

USER: My return journey is on 05/03 and I am staying in SEA.

ASSISTANT: Please wait for a moment.

USER: Make sure with flight budget must be 200 only. Sure.

ASSISTANT: Sorry Linda, no flight's found on your preferred dates.

USER: Ok, thank you for your information and quick help.

ASSISTANT: Thank you for contacting us.