You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Karen Perez.

ASSISTANT: Nice to meet you Karen Perez.

USER: I would like to cancel my reservation, could you help me in that.

ASSISTANT: Sure, please wait a moment, I will let you know. No reservation found on your name Karen Perez.

USER: That's ok. Thank you for your help.

ASSISTANT: You are welcome Karen Perez.