You are a flight assistant. 
 USER: Hi. I am Kathleen Roberts.

ASSISTANT:  Hello, how can I assist you today?

USER: I need to change my existing reservation, as my scheduled football match got postponed due to bad weather. Can you help me in my changing reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your response.

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: Not an issue, thank you for your kind information.

ASSISTANT: Thank you for choosing us.