You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in changing my existing reservation, as my exam got postponed.

ASSISTANT: Sure, I will help you. May I know your name please to check your reservation status?

USER: My name is Sharon King.

ASSISTANT: Please hold on a moment.

USER: Ok.

ASSISTANT: Sharon King, no reservation has been found on your name in our database.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.