You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket to San Francisco with price under 1000. Can you please help me with it?

ASSISTANT: Sure, may I know your airport codes please?

USER: Airport codes are DEN-SFO.

ASSISTANT: Please share me your trip dates.

USER: Trip dates are 11/21 and 11/23.

ASSISTANT: May I know your good name please.

USER: My name is Jonathan Miller.

ASSISTANT: We found a flight on your details with airline Frontier, flight number: 1003. Shall I proceed for booking?

USER: Yes, you can proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for the help.

ASSISTANT: Thanks for choosing us.