You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Nancy Anderson.

ASSISTANT: How may I serve you today?

USER: Owing to any emergency I need to cancel my reservation. Will you help me in cancelling my reservation?

ASSISTANT: Sure, I am here to help you. Please give me a minute.

USER: Thank you. Sure.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you for availing us, hope to serve you better next time.