You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you help me in booking my flight ticket from Aug 4th to Aug 6th?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Let me know your airport codes?

USER: My airport codes are from CLT to DEN.

ASSISTANT: Can I know your name?

USER: My name is Kevin Adams.

ASSISTANT: Do you have any preference?

USER: I prefer a economy class flight.

ASSISTANT: Connecting flight can be booked with American airline for price 200 having flight number 1000.

USER: You can proceed.

ASSISTANT: Ticket is booked.

USER: Thank you.

ASSISTANT: Thank you.