You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

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

ASSISTANT: Sure, please provide your good name to check the reservation in the reservation list.

USER: Sure, my name is William Mitchell.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for your positive response.

USER: Anyways, thank you for your service.