You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you right now?

USER: I would like to do some changes in my existing reservation. can you help me for that?

ASSISTANT: Sure, I can help you with that and may I know your name please?

USER: My name is Linda Clark.

ASSISTANT: Thank you for your information, based on your name I have found the reservation. Can you please provide your new airport codes?

USER: My new travelling airport codes are from DTW to SEA.

ASSISTANT: May I know your travel dates?

USER: My travelling dates are Dec 12 and Dec 14.

ASSISTANT: Is there any other specifications?

USER: I need a single connecting flight.

ASSISTANT: Give me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for your information, there is a flight 1011 with a 1 drop off in Spirit airlines and the fare of the ticket is 100. Is it ok for you to book the ticket?

USER: Ok, proceed for booking.

ASSISTANT: I have successfully changed your previous booking to above airlines and the ticket booking is done.

USER: Thank you for booking.

ASSISTANT: You are most welcome and have a happy journey.