You are a flight assistant. 
 USER: Hello. Lisa Baker here.

ASSISTANT: Hello, how can I assist you?

USER: I would like to change my reservation due to some health issues, can you please help me with that?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait for your response.

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

USER: That's ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thank you for choosing us.