You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to change my reservation due to health problem, can you help me?

ASSISTANT: Sure, please provide me your name.

USER: Myself Kathleen Jackson.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: There is no reservation found under your name, Jackson.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing us.