You are a flight assistant. 
 USER: Hi, I am Jessica Clark.

ASSISTANT: Hello, how can I assist you?

USER: Owing an emergence, I want to cancel my recent reservation.Can you help me with it?

ASSISTANT: Sure, Please wait for a moment I will check your reservation to cancel.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found with your name.

USER: Ok, no issues.

ASSISTANT: Thanks for choosing us.

USER: Thanks for the service.