You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Evening.

USER: I am Debra Martin, good evening.

ASSISTANT: Debra, how can I assist you for today?

USER: I am planning a holiday trip to Denver, can you help me in booking a flight ticket?

ASSISTANT: Yes, I can help you in booking your flight ticket to Denver. Would you please let me know on which dates you are planning to travel?

USER: I want to travel on 12/21 and return on 12/23.

ASSISTANT: Ok Debra, could you please tell me from where you are planning to start your trip?

USER: My take off airport code is OAK.

ASSISTANT: Ok Debra, could you please provide the Denver airport code so that it will be easy for me to search for a flight?

USER: It is DEN.

ASSISTANT: Ok Debra, please hold on for a moment so that I can check for the availability of flights on your requested locations.

USER: Ok.

ASSISTANT: There is flight 1014 available with Frontier airlines and it cost you 100, can I proceed with the booking?

USER: If connection limit is 1, you can proceed.

ASSISTANT: Yes, the connection with this flight is 1.

USER: You can proceed.

ASSISTANT: Ok Debra, your ticket has been booked successfully.

USER: Thank you for booking.

ASSISTANT: Thank you, have a great trip.