You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Please let me know your name?

USER: Sure, my name is Shirley Mitchell.

ASSISTANT: Ok. Let me check details with your recent reservation.

USER: Sure, I will wait.

ASSISTANT: I regret, there is no reservation by name Shirley Mitchell.

USER: Ok, no problem.

ASSISTANT: Thanks.

USER: Anyways, thank you for your service.

ASSISTANT: Have a nice day!.