You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: I would like to change my existing reservation due to my exams got postponed. Can you please help me with this?

ASSISTANT: Sure, we are glad to help you. May I know your name, please?

USER: I am Emily Davis.

ASSISTANT: Sorry to say that there were no reservation found under your name.

USER: Ok, not an issue. Thanks for your quick response.

ASSISTANT: Thank you for availing with us. Have a beautiful day.

USER: Thank you.