You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need to cancel my existing reservation, as my planned trip with my friends got cancelled. Can you please help me out?

ASSISTANT: Sure, may I know the name please?

USER: Sure, my name is Brian Martinez.

ASSISTANT: Give me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: I regret to inform that there is no reservation by the name  Brian Martinez.

USER: Not a big problem, anyway thank you for the information.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your service.