You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for the day?

USER: Patrick Martin here. Owing to an emergency I need to change my existing reservation. Can you help me in that?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

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

ASSISTANT: Thank you for contacting us, have a great day.