You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am John Hall.

ASSISTANT: John Hall, how may I assist you today?

USER: I want to attend a food festival at SFO. Can you book a flight ticket from LAX?

ASSISTANT: Sure, I will help you. Please help me with your planned travel dates.

USER: I would like to take off on Aug, 28 and return back on Aug, 30.

ASSISTANT: Ok, do you need a direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Please help me with your class preference.

USER: I am comfortable with any class.

ASSISTANT: Please let me know with your preferred departure and return time.

USER: My depart time should be at morning.

ASSISTANT: Do you have any other preferences in your journey?

USER: No.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Thank you. I am really sorry to inform you that there are no active flights available.

USER: It's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for reaching us. Have a great time.