You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, can you please tell me how can I guide you?

USER: Due to my health issues, I would like to cancel my reservation. Can you help me?

ASSISTANT: Yes, I am here to help you about it. Can you please provide your name to check the existing reservation under name?

USER: Please check with the name Donna Hall.

ASSISTANT: Sorry Hall, I have checked that there is no reservation under your name in our listing.

USER: That's fine, thank you for the information.

ASSISTANT: My pleasure, thank you for choosing our service.