You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Nancy Jackson here.

ASSISTANT: Nice to meet you.

USER: Can you please help me in cancelling my reservation due to my poor health?

ASSISTANT: Sure, I can help you with that. Please wait for a while.

USER: Ok.

ASSISTANT: I found your reservation and I have successfully cancelled it.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.