You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

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

ASSISTANT: Sure, I am here to help you in that.

USER: Thank you.

ASSISTANT: May I know your good name please to track the details?

USER: Myself Jacob Baker.

ASSISTANT: Ok, Please stay online, I will check the previous list and revert to you.

USER: Ok.

ASSISTANT: We are sorry to say that, there is no active reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for consulting us, wish you a nice day.