You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Actually, I would like to cancel my reservation which is done recently due to some problems, can you please help me in this intent?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can I have your name please for checking your reservation?

USER: Sure, my name is Ryan Martin.

ASSISTANT: Ok, please wait a moment to check your reservation.

USER: Sure, I will wait.

ASSISTANT: Sorry Ryan Martin, no reservation has found under your name to cancel.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for choosing us, have a great day.