You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to change your existing reservation, due to some health issue. Can you please help me out?

ASSISTANT: Sure, please share your good name?

USER: My name is Jessica Brown.

ASSISTANT: Sure, please wait for a while.

USER: Ok, take your time.

ASSISTANT: Sorry, no reservation found on your given name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.