You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Debra Green.

ASSISTANT: How may I help you now?

USER: I need to reach Charlotte on 03/25 to take a part in trekking in Evans mountain and my return date would be on 03/27, can you help me in booking?

ASSISTANT: Sure, I will help you. From where would you prefer to take off?

USER: I would like to start from CO-DEN.

ASSISTANT: Kindly, mention your price limit.

USER: I need the flight ticket within the fare limit 500.

ASSISTANT: Let me know your destination airport code.

USER: My destination point is NC-CLT.

ASSISTANT: Wait for a while, I will let you know the flight availability.

USER: Sure.

ASSISTANT: Thank you for waiting. There is a connecting flight of Frontier airline available with fare 100 and 1010 number.

USER: That's perfect, you can proceed with the booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your quick service.

ASSISTANT: Thank you for choosing us.