You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello , how may I help you today?

USER: Aid me to cancel the reservation with the name of James Johnson, as my friend met with an accident.

ASSISTANT: Sure. Please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Thanks for your presence, there is no reservation found on your name.

USER: Fine, thank you.

ASSISTANT: Thank you for choosing us.