You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Joshua Perez.

ASSISTANT: How may I assist you Perez?

USER: I am not ready to travel right now due to health issues, so can you help me cancelling my ticket?

ASSISTANT: Sure, I will help you. Please hold on a moment to check your previous reservation status.

USER: Ok, I will wait for your response.

ASSISTANT: We regret that, there is no reservation found with your name in our records.

USER: Oh! It is ok, I think already my sister canceled my reservation. Thank you for your services.

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