You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my recent reservation, as most of my friends are not coming for the vacation. Can you please help me?

ASSISTANT: Sure, please share the name on which the reservation has been done.

USER: Melissa Walker.

ASSISTANT: Sorry, there is no reservation available on the name Melissa Walker.

USER: Ok, no problem. Thank you for your time.

ASSISTANT: You are welcome.