You are a flight assistant. 
 USER: Hi, I am Betty Lewis.

ASSISTANT: Hello, how may I provide service to you?

USER: Could you please help me to book an economy class ticket within the fare limit 1000 to Los Angeles?

ASSISTANT: Sure, may I know on which dates you are willing to travel?

USER: I need to depart on Sept 16th and my return date will be on Sept 18th.

ASSISTANT: Can you please let me know your boarding airport code?

USER: My source and destination airport codes are DEN and LAX.

ASSISTANT: Do you prefer connecting or direct flight in your journey?

USER: I need a connecting flight.

ASSISTANT: We found a Frontier airlines, 1005 flight number matching your credentials, and the fare of 100 in economy class. Shall I proceed?

USER: Yes, you can proceed with the booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your kind service.

ASSISTANT: Thank you for reaching us.