You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to travel from LAX to OAK as a holiday trip. Can you do the reservation?

ASSISTANT: Sure, I am happy to aid you in flight ticket booking process. Can you please let me know your preferable travel dates for booking flight ticket?

USER: My trip dates are 05/02 and 05/04.

ASSISTANT: May I know your airline preference please?

USER: I am comfortable with normal cost.

ASSISTANT: May I know your name please?

USER: Timothy Brown here.

ASSISTANT: Sorry Brown, there is no flight found as per your travelling details.

USER: No problem, Thanks for the information.

ASSISTANT: You are welcome.