You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to cancel my previous ticket booking due to health issues that doctor suggested not travel any where, can you help in that cancelling?

ASSISTANT: Sure, we are gleeful to help you.

USER: Thank you.

ASSISTANT: Please wait a moment to check your reservation status.

USER: Ok.

ASSISTANT: Can you please provide your name to check?

USER: I am Justin Harris.

ASSISTANT: Sorry to inform you, there is no reservation exists with the name of Justin Harris.

USER: Not a problem with that one, thanks for your help and your great service.

ASSISTANT: Thank you for approaching us, have a great day.

USER: Welcome.