You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Donna Hall.

ASSISTANT: How may I assist you?

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

ASSISTANT: Sure, I will help you out. Please allow me a moment to check the previous reservation on your name.

USER: Ok, I will wait for your response.

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

USER: Oh! It's ok, no problem. Thank you for your services.

ASSISTANT: Thank you for reaching us.