You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Melissa Walker.

ASSISTANT: How can I aid you Walker?

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

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Walker, there is no reservation under your name in our website.

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

ASSISTANT: It's my pleasure, have a good day.