You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to change my flight reservation as my mother is unwell, can you please help me out?

ASSISTANT: Sure, can I know your name please?

USER: The reservation was done in the name of Barbara Allen.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry Allen, there is no reservation found on your name.

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

ASSISTANT: Thank you for approaching us.