You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Larry Brown.

ASSISTANT: How can I help you?

USER: Owing to emergency, I need to cancel my recent reservation. Please help me with that.

ASSISTANT: Sure, let me check your reservation details in our database.

USER: Ok.

ASSISTANT: Sorry, we couldn't found any reservation in our database.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for connecting us.