You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: I want to change my existing reservation because my test match has been postponed due to heavy rains.

ASSISTANT: Surely, I will help you. May I know your name?

USER: Yes, I am Thomas Phillips.

ASSISTANT: Sorry, No reservation found on your name.

USER: Not an issue. Thanks for your support.

ASSISTANT: Thank you, Have a nice day.