You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Cynthia Taylor. I have an earlier reservation to sign a new contract for new project, due to some problems it got postponed. Could you please help me to change my existing reservation?

ASSISTANT: Sure, we are here to help you. Give me a moment to check your details.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name to proceed further.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for reaching us.