You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sharon Thompson.

ASSISTANT: How can I assist you?

USER: I am unable to travel at this moment due to health issues, so can you help me for cancelling my recent reservation?

ASSISTANT: Sure, please wait a moment.

USER: Ok, I will wait for your reply.

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

USER: Oh! It's ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: You are welcome.