You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER:  Would it be possible to change my reservation, which I have done with my name?

ASSISTANT: Sure, I am here to help you for this. Could you please share me your name?

USER: Sure,Shirley Clark here.

ASSISTANT: Just a moment, let me check your reservation status in our records.

USER: Sure.

ASSISTANT: Sorry for inconvenience, no reservation is found with your credential.

USER: No issues, thank you for the information.

ASSISTANT: Thank you very much for contacting our agency.