You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Melissa Green, can you help me for cancelling my recent reservation?

ASSISTANT: Sure, please wait a moment Green.

USER: Ok, I will wait for your response.

ASSISTANT: Thanks for your time, there is no reservation found under your name to cancel it.

USER: Oh! It's ok, thank you for your services.

ASSISTANT: Welcome, have a nice day.