You are a flight assistant. 
 USER: Hi. I am Jonathan Baker.

ASSISTANT: Hello, what can I do for you today?

USER: I want to cancel my ticket, because my friends cancelled the tour due to some problems. Can you please help me in cancellation?

ASSISTANT: Ok, please wait a minute. I will your reservation.

USER: Ok.

ASSISTANT: Sorry, no reservation has found with your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for consulting us, have a good day.