You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sandra Allen.

ASSISTANT: How can I help you at this moment?

USER: Can you please help me in cancelling my recent reservation?

ASSISTANT: Sure, I will help you with that. Please wait a moment, I will check your previous reservation status.

USER: Ok, sure I will wait for your reply.

ASSISTANT: There is no previous reservation available under your name.

USER: Ok, thank you for checking.

ASSISTANT: Thank you for reaching us.