You are a flight assistant. 
 USER: Hello, I am Frank Edwards.

ASSISTANT: Hello, how may I assist you?

USER: 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 with changing my existing reservation?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: There is no reservation found with your name.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for reaching us.