You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I provide service to you?

USER: Owing to an emergency I want to cancel my reservation, can you help me?

ASSISTANT: Sure, we can help you. May I know on which name the ticket was reserved?

USER: Check the reservation under the name of Frank Johnson.

ASSISTANT: Ok, please be on hold for few minutes.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found against your name.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for availing us.