You are a flight assistant. 
 USER: Hi. I am Patrick Martin.

ASSISTANT: Hello. How can I help you?

USER: Owing to an emergency, I need to change my reservation. Can you please help me with that?

ASSISTANT: Sure, I am here to help you. Please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry we didn't find any reservation on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us, have a good day.