You are a flight assistant. 
 USER: Hi. I am Frank Wright.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found basis on your details.

USER: No issue, thank you for your time in checking.

ASSISTANT: Thank you for reaching us.