You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I need to cancel my reservation as my plan to go for trekking got cancelled. Can you help me?

ASSISTANT: May I know your name to check your reservation?

USER: I am Dennis Lopez.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: There is no reservation found on your name.

USER: Ok fine, thanks for your response.

ASSISTANT: Welcome Dennis Lopez.