You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jacob Anderson.

ASSISTANT: How can I assist you?

USER: I want to change my existing reservation due to some health issues, can you help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: No problem, thank you for the information.

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