You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: William Hill here.

ASSISTANT: How may I guide you?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, please wait a minute.

USER: Ok, take your time.

ASSISTANT: Your reservation is not found under your name.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Most welcome.