You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to change an existing reservation due to an emergency, can you please help me?

ASSISTANT: Sure, I am here to help you. May I know your name please?

USER: Sure, my name is Samuel Jackson here.

ASSISTANT: Ok, please wait a minute.

USER: Sure, I will wait.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: Ok, not an issue.Thank you for your information.

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