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

ASSISTANT: Hello. Lee, how may I guide you?

USER: Can you help me in cancelling my recent reservation, as my exam is postponed?

ASSISTANT: Sure, I will help you with that. Let me check your reservation status in our records.

USER: Ok, I will be waiting.

ASSISTANT: Sorry for inconvenience there are no reservation is found on your name in our records.

USER: That's ok, thank you.

ASSISTANT: You are welcome, thank you Lee for contacting us.