You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: Can you share your good name?

USER: My name is Thomas Adams.

ASSISTANT: Please be on hold.

USER: Sure, take your time.

ASSISTANT: There is no reservation found on your name in our database to change it.

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

ASSISTANT: Thank you for availing us.