You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Lisa Miller.

ASSISTANT: How may I aid you today?

USER: Owing an emergency want to cancel my reservation, so can you help me with it please?

ASSISTANT: Sure, I will help you. Please wait.

USER: Thank you, take your time.

ASSISTANT: Thanks for waiting, there is no reservation found on your name to proceed with cancellation.

USER: That's ok, thank you for the response.

ASSISTANT: Ok, Thank you.