You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for today?

USER: I am planning to change an existing reservation, due to health issue. Can you please help me out?

ASSISTANT: I am here to help you about that, can you please let me know your name for checking the reservation status under your name?

USER: Sure, my name is Jessica Jackson.

ASSISTANT: Please wait for sometime to check the reservation status.

USER: Sure.

ASSISTANT: Sorry for the trouble which is caused to you, I have not found any reservation on your name in our database.

USER: That's fine, thank you for your service.

ASSISTANT: You are welcome, thank you for reaching us.