You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Actually my exam is postponed so that I want to cancel my recent reservation, can you help me?

ASSISTANT: Sure, I will help you. Please tell me your good name?

USER: Sure, I am Frank Hall.

ASSISTANT: Ok, please wait a minute, I will be back.

USER: OK, sure.

ASSISTANT: Sorry to inform you Hall, there is no reservation found with your name in our database.

USER: Ok, thank you for your information.

ASSISTANT: You are welcome. Thank you for reaching us.