You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service do you need from us?

USER: Actually want to cancel recent reservation due to an emergency. Can you help me?

ASSISTANT: Ok, can you please provide me your name to check the ticket status?

USER: Sure, I am Dennis Allen.

ASSISTANT: Ok, please give me a minute.

USER: Ok.

ASSISTANT: Sorry for the trouble, there is no reservation found with your name in our database.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.