You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. May I know your name?

USER: My name is Lisa Nelson.

ASSISTANT: What can I do for you?

USER: Due to health issues, I want to cancel my recent reservation. Can you help me with cancelling the ticket?

ASSISTANT:  Sure, Please wait a while I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for opting us.