You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER:  I am Alexander Scott here. I want to book a flight ticket from Oakland, can you please help me in that?

ASSISTANT: Sure, can you share your airport codes please?

USER: ok, my travelling airline code are from OAK to LGA.

ASSISTANT: Now please tell me your travel dates?

USER: Sure, I want to start my journey on 03/10 an return back on 03/12.

ASSISTANT: Thanks for waiting. There is no flights available with your flight details.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thanks you for your help.