You are a flight assistant. 
 USER: Hi, I am Katherine Nelson.

ASSISTANT: Hello, how can I help you?

USER: My planned trip to Houston with my friends got cancelled, so I want to cancel my recent reservation. Could you help me in cancelling.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: We have not found any flight reservation with your given name.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thanks for choosing us.