You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket to attend Fun Fair in Minneapolis & St. Paul, MN - MSP.

ASSISTANT: Ok.

USER: Can you please aid me in booking a flight ticket from Denver?

ASSISTANT: Sure, when would you like to travel from Denver?

USER: My departure day is on 09/21.

ASSISTANT: May I know your return date?

USER: I am Willing to return on 09/23.

ASSISTANT: Can you please share me Denver airport code?

USER: Sure, my boarding airport code is CO - DEN.

ASSISTANT: For booking process we need your name also. So, can you please share me your name?

USER: My name is Sarah Carter.

ASSISTANT: How much you can afford for this ticket?

USER: My price limit is 1000.

ASSISTANT: We found a flight on your details with airline Hawaiian, flight number: 1000 and with fare of 100. Shall I reserve this ticket for you?

USER: Please proceed if it is a direct flight.

ASSISTANT: Sorry there is no direct flight on your details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.