You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: I want to change my existing reservation as my exam got postponed.

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

USER: I am Emma Lewis.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for being patient, There was no reservation found on your name to change it.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for connecting with us.