You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation, because recently I got an accident as per doctor said I have to take rest for few months. will you help me?

ASSISTANT: Sure, we will surely help you.

USER: Thank you.

ASSISTANT: Please provide me your name to check whether any active reservation found on your name or not.

USER: My name is Gregory Roberts.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation exist on your name.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for contacting us.