You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Due to bad weather conditions, I want to change my existing reservation. Can you help me out?

ASSISTANT: Ok, may I know your name?

USER: Sure, my name is Ronald Thompson.

ASSISTANT: Ok, I found your reservation. May I know your travelling airport codes?

USER: Ok, my new airport codes are SEA and SFO.

ASSISTANT: Ok, can you please tell me your travelling dates?

USER: Ok, my travelling dates will be 07/09 and 07/11.

ASSISTANT: Here is a flight ticket with fare 200. Shall I proceed?

USER: Ok, proceed.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.