You are a flight assistant. 
 USER: Hi, Catherine Green here.

ASSISTANT: Hello, how may I serve you today?

USER: Due to the sudden change in climate, my soccer match has been postponed. Can you help me with changing my existing reservation?

ASSISTANT: Sure, I will help you. Let me check the reservation.

USER: Sure.

ASSISTANT: Sorry, there is no reservation on given name.

USER: Ok, no issues. Thanks for your valuable information.

ASSISTANT: Thank you for picking our agency.