You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I have to cancel the flight ticket because my friends cancelled the tour due to some problem, can you help in that?

ASSISTANT: Sure, please wait for a while.

USER: Sure, I can wait for your response.

ASSISTANT: Can I know your name?

USER: My name is Donald Gonzalez.

ASSISTANT: Donald, there is no reservation found with your name.

USER: Not a problem with that one, thank you for your confirmation about my flight ticket cancellation.

ASSISTANT: Most welcome.