You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Last week I booked a flight ticket with your agency for my business trip to Seattl but due to my health concern I am unable to travel on that date. So can you change my flight ticket reservation?

ASSISTANT: Sure, I am here to help you. Can I have your name please to check the status of your reservation?

USER: I am Ruth Gonzalez.

ASSISTANT: Ruth Gonzalez, I have found your reservation. Can I have your airport codes please?

USER: The airport codes are from LAS to SEA.

ASSISTANT: May I know your planned travel dates please?

USER: My travel dates are from 24 July to 26 July.

ASSISTANT: Do you need a connecting flight?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: I found an economy class in American Airlines with fare 300 and it has single connection. Can I book your ticket?

USER: You can book the flight ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1023.

USER: Thank you.

ASSISTANT: Thank you for approaching us.