You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, please mention your name for checking the reservation status?

USER: I am Nancy Adams.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Your reservation is found. Please provide your airport codes.

USER: My airport codes are from OAK to SEA.

ASSISTANT: Please mention your travelling dates.

USER: My travel dates are from Dec 28th to Dec 30th.

ASSISTANT: Do you have any preferences about flight connections?

USER: I want a single connection in between my journey.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: The Delta airlines providing an economy class flight with price 200 and the connections 1. Shall I confirm your ticket?

USER: Yes, please proceed.

ASSISTANT: Your ticket is booked. The flight number is 1006.

USER: Thank you.

ASSISTANT: Welcome, have a great day.