You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation. Can you help me for that one?

ASSISTANT: Sure, may I know your good name please?

USER: Sure, Melissa Green.

ASSISTANT: Wait a moment please.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found for the user name in our back end to cancel it.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for opting us.