You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Samantha Smith.

ASSISTANT: Hello Smith.

USER: I want to change my reservation due to bomb blast in JFK.

ASSISTANT: Sure, please give me a moment, I will check with your details. Sorry Smith, there is no reservation found on your name.

USER: That's ok, thanks for your help.

ASSISTANT: Thank you for reaching us.