You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am Melissa Johnson. I would like to cancel reservation as I am leaving for business trip, can you please help me out?

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

USER: Thank you. Sure.

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

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for contacting us.