You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Angela Baker, can you help me to change my reservation?

ASSISTANT: Sure, I will help you in changing your reservation.

USER: Ok.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry Baker, there is no active reservation found with your name in our records.

USER: It's ok, thanks for checking.

ASSISTANT: Most welcome.