You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you at this moment?

USER: I am Frank Carter. I need to cancel my recent reservation due to my scheduled examination dates has been postponed. Can you please help me?

ASSISTANT: Sure, I will help you. Please wait for a moment.

USER: Ok, I will wait for your response.

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

USER: No problem. Thank you for your information.

ASSISTANT: You are welcome, thank you for reaching us. Have a nice day.