You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Lisa Adams here. I would like to change my recent reservation, can you help me with this?

ASSISTANT: Sure, I am here to help you. Please give me a moment to check your reservation.

USER: Sure. Take your own time.

ASSISTANT: Sorry, there is no reservation found on your name in our records.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for approaching us.