You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi,.

USER: I am Ashley Allen.

ASSISTANT: How may I assist you?

USER: I am planning to visit my friend's home.

ASSISTANT: OK.

USER: I need your help to book my flight ticket.

ASSISTANT: Sure. May I know your journey specifications?

USER: Ya sure. I am traveling from Orlando FL-MCO to Oakland CA-OAK.

ASSISTANT: Fine, will you give me travelling dates?

USER: My depart is on 12/12 and returning on 12/14.

ASSISTANT: Wait for a while,I will get back to you.

USER: OK.

ASSISTANT: Thank you for your valuable time. Sorry to inform you,there is no ticket available as per your requirement. thank you for reaching us.

USER: Thank you.

ASSISTANT: Have a great day.