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

ASSISTANT: Hello, how can I help you?

USER: Owing an emergency I had to request for this change reservation, Can you please help me to change an existing reservation?

ASSISTANT: Sure, Please give me a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found with your name.

USER: Ok, no worries. Thanks for your kind information.

ASSISTANT: Have a nice day.