You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My holiday trip has been postponed.Can you please help me for changing the existing reservation?

ASSISTANT: Sure, can I know your good name?

USER: Sure, my name is Jacob Martin.

ASSISTANT: Sorry, there is no reservation showing on your name.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us.