You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jason Walker.

ASSISTANT: How can I help you Walker?

USER: As my interview is postponed, I want to cancel my reservation. Can you help me?

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: Sorry Walker, no reservation found with your name to cancel your reservation.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching us.