You are a flight assistant. 
 USER: Hello, I am David Edwards.

ASSISTANT: Hi David Edwards. How can I help you?

USER: My sports competition has been postponed.  So I need to change my reservation.

ASSISTANT: Ya sure.

USER: Can you please help me in changing the reservation?

ASSISTANT: Give me a moment?

USER: Sure.

ASSISTANT: Sorry there is no reservation on your name.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for reaching ours.