You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I am Stephen Hill. Due to my health problem I want to cancel my reservation, can you please help me to cancel my reservation?

ASSISTANT: Sure, please wait for a minute.

USER: Ok, I will wait.

ASSISTANT: Thanks for your valuable time, there is no reservation found with your name.

USER: Ok, no problem. Thank you so much.

ASSISTANT: Thanks for availing us.