You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Karen Clark.

ASSISTANT: How may I aid you today?

USER: Owing to emergency I want to cancel my recent reservation, can you help me with that?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not find any active reservation on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.