You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can assist you at this moment?

USER: I am Carolyn Anderson.

ASSISTANT: Welcome to flight booking agency Carolyn.

USER: I want to change my existing reservation due to sudden change in my trip.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation status.

USER: Sure.

ASSISTANT: Yes, I have found your reservation. Can you please help me out with your new journey airport codes to go there?

USER: My airport codes are from LGA - SEA.

ASSISTANT: Ok, may I know your departure and return dates of travelling?

USER: My travelling dates are 05/25 to 05/27.

ASSISTANT: Thank you for providing your travel details. I will put the conversation on hold to check the best flights available in your route.

USER: Sure.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 200 is provided by Frontier airlines. Shall I proceed with this?

USER: Yes, you can proceed to book.

ASSISTANT: Ok, I have successfully booked your ticket in flight number 1004.

USER: Thanks for your booking.

ASSISTANT: Thank you for reaching to our services, hope you have a great journey.