You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicole Davis.

ASSISTANT: How can I help you?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Can you help me?

ASSISTANT: Sure. Wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting. We found a reservation on your name, Can you provide me the travelling dates to change?

USER: Sure. 12/17 and 12/19 are my travelling dates.

ASSISTANT: May I know your airport codes?

USER: SEA and LGA are my comfortable airport codes.

ASSISTANT: Do you have any preferences?

USER: 200 is my fare.

ASSISTANT: There is a flight 1024 in Frontier airline and price 100 with a connection. Shall I proceed?

USER: You can reserve it.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you.