You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please help me in making an airline reservation from OAK to SFO?

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: My journey dates are Nov 25th and Nov 27th.

ASSISTANT: May I know your name please?

USER: Raymond Allen.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.