You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: Please help me to cancel my recent reservation as my plan to meet my grand patents got post pone due to my health issues.

ASSISTANT: Sure, I'll help you in cancellation. Could you please let me know your name to check the reservation list?

USER: I am Andrew Johnson.

ASSISTANT: Thank you for providing your name , please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform you that there is no reservation found by this name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for availing us.