You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Margaret Lopez. Due to some personal issues, I want to cancel my reservation. Can you help me with that?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for the patience, there is no reservation found on your name.

USER: Ok. Thank you for the information.

ASSISTANT: Ok, thank you for choosing us.