You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Nicholas Lopez.

ASSISTANT: How may I guide you today?

USER: Due to some business meeting I am going to cancel my reservation. Could you please help me in cancelling the reservation?

ASSISTANT: Sure, I will help you with that. Please wait for a while.

USER: Ok. I will wait for your response.

ASSISTANT: I am sorry to say that there is no reservation found under your details.

USER: Not a big problem, anyhow thank you very much for your help.

ASSISTANT: Thank you for contacting us.