You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name?

USER: I am Karen Hill.

ASSISTANT: Yes, Hill what can I aid you for today?

USER: I would like to cancel my recent reservation because suddenly my interview got postponed due to heavy rains, can you please help me out with that?

ASSISTANT: Yes, I am here to help you.

USER: Thank you.

ASSISTANT: Please, give me a moment to check the existing reservation under your name.

USER: Sure.

ASSISTANT: Sorry to say this, there is no reservation under your name in our data base.

USER: It's ok. Thank you for searching.

ASSISTANT: My pleasure, have a great day ahead.

USER: Thank you.