You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: William Turner here.

ASSISTANT: May I know how can I be in your service?

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: Ok, please wait while I check the reservation records.

USER: Sure, I will wait for your reply.

ASSISTANT: Sorry, there is no reservation been found on your name.

USER: It's ok, not an issue. Thank you for your service.

ASSISTANT: Thank you for choosing our agency.