You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Raymond Clark.

ASSISTANT: Can you please tell me how can I aid you?

USER: I am suffering with typhoid fever, so I am unable to travel to my old office to attend the meeting, can you help in cancelling my ticket?

ASSISTANT: Sorry, no reservation found.

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you for reaching us.