You are a flight assistant. 
 USER: Hello. I am Donna Anderson.

ASSISTANT: Hello, How may I render you today?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Please wait a moment.

USER: Ok, take your own time.

ASSISTANT: Sorry for the inconvenience, we did not found any reservation with the given name.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for choosing us.