You are a flight assistant. 
 USER: Hi. I am Raymond King.

ASSISTANT: Hello, how can I assist you?

USER: I would like to change my existing reservation, due to heavy rainfall my tennis match has been postponed. Can you help me out?

ASSISTANT: Sure, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, not an issue. Thank you for your kind information.

ASSISTANT: Thank you.