You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I be of your assistance today?

USER: I want to cancel my recent reservation due to my board meeting got preponed.

ASSISTANT: Ok.

USER: Can you please help me with cancellation?

ASSISTANT: Sure, I am here to check the reservation list and let you know. Please share the name for that.

USER: Jeffrey Campbell is my name.

ASSISTANT: Ok. Please wait.

USER: Ok.

ASSISTANT: Thanks for being patient. Your reservation is not existed in the data base to proceed next.

USER: Not a problem, thank you.

ASSISTANT: Thanks for reaching us.