You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: Can you please change my reservation, due to an emergency?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: On whose name, you have made the reservation earlier?

USER: I made an earlier reservation on the name of Timothy Clark.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation was found on your name to change.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for availing us.