You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Betty Walker.

ASSISTANT:      Ok.

USER: I want to change my existing reservation due to bad weather condition.

ASSISTANT: Ok, please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to say no reservation found on your name.

USER: Not an issue, thanks for your help.

ASSISTANT: Thank you for reaching us, have a nice day.