You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

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

ASSISTANT: Sure, let me know your name to check for your reservation status?

USER: I am Jason Davis.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name in our records to change it.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting us.