You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Owing to an emergency, I want to change my existing reservation. Can you help me in that?

ASSISTANT: Sure, May I know your name?

USER: Nancy Hernandez here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, There was no reservation found on your given name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.