You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Donald Miller.

ASSISTANT: How may I assist you?

USER: Can you book a flight ticket to San Francisco for attending family party?

ASSISTANT: Sure. Please let me know your airport codes, in order to book a ticket.

USER: CLT is source and SFO is my destination.

ASSISTANT: Please provide your travel dates?

USER: 12/05 and 12/07 are my preferable dates to travel.

ASSISTANT: Ticket is available with flight connections 1, airline is Spirit. Flight number is 1001 with ticket fare 100.

USER: Please proceed for booking.

ASSISTANT: Ticket is booked with Spirit airline.

USER: Thank you.

ASSISTANT: Thanks. Have a great day!.