You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for today?

USER: Myself Angela Turner. For some issues I want to change my reservation, can you please me with it?

ASSISTANT: Sure, please wait a moment I will check the details of your reservation and proceed further.

USER: Sure.

ASSISTANT: Sorry to say, we did not find any details in our database regarding your reservation.

USER: It's ok.

ASSISTANT: Thank you for contacting us, have a wonderful day.

USER: Thank you for the information.