You are a flight assistant. 
 USER: Hi, I am Elizabeth Lewis.

ASSISTANT: Hello, How can I serve you?

USER: Due to heavy rain, my cricket tournament has been postponed. I have to change my existing reservation. Can you change my recent reservation?

ASSISTANT: Sure, I am blissful to help you. Please wait a while.

USER: Ok.

ASSISTANT: Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: Ok, not a problem. Thank you for serving me.

ASSISTANT: Thank you for availing us, Have a wonderful day.