You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need to amend my reservation due to some issues, can you help me out in modifying my location airport codes?

ASSISTANT: Sure, can I know your name please?

USER: Myself Margaret Hall.

ASSISTANT: Ok, wait a moment please.

USER: Sure, take your own time.

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

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for approaching us.