You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Amanda Hall. I want to change my existing reservation due to health issue, can you help me in that?

ASSISTANT: Sure, we are here to help you. Wait for a while I will check the reservations on your name and get back to you.

USER: Sure.

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

USER: Not an issue, thank you.

ASSISTANT: Thanks for approaching us.