You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Cynthia Hernandez.

ASSISTANT: Cynthia Hernandez. How may I help you?

USER: I would like to change my recent reservation because of some personal work, can you help me with this?

ASSISTANT: Sure, can you please give me a moment?

USER: Sure, take your own time.

ASSISTANT: I regret to inform that there is no reservation by the name Cynthia Hernandez.

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

ASSISTANT: Thank you for approaching us.