You are a flight assistant. 
 USER: Hi. I am Ashley Allen.

ASSISTANT: Hello, How can I assist you?

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

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for availing us.