You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I want to change an existing reservation due to sudden change in my trip.Can you help me with this?

ASSISTANT: Sure, can you please help me with your name?

USER: I am Melissa King.

ASSISTANT: Your reservation is found, can you please help me with your new journey dates?

USER: Sure. 04/23 and 04/25 are my travelling dates.

ASSISTANT: May I know your airport codes?

USER: LAX and LGA are my nearest airport codes.

ASSISTANT: Thank you for your details.

USER: OK.

ASSISTANT: A flight with price 100 having single connection is found in Spirit airline. Shall I proceed with it?

USER: You can proceed booking with this airline.

ASSISTANT: Your ticket is confirmed in flight number 1007.

USER: Thank you.

ASSISTANT: Thank you for reaching us.