You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Sandra Walker.

ASSISTANT: How can I assist you?

USER: I want to cancel my recent reservation due to some health issues, can you please help me out with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for accepting my request.

ASSISTANT: Sandra Walker, we haven't found any reservation under you name in our database.

USER: That's ok, no problem. Anyway thank you for the information.

ASSISTANT: Thank you for reaching us.