You are a flight assistant. 
 USER: Hello, I am Charles Rodriguez.

ASSISTANT: Hello Charles Rodriguez, how can I assist you?

USER: I want  to cancel my trip due to an emergency. Can you aid me in cancelling my ticket?

ASSISTANT: Sure, please give me a moment.

USER: Take your time.

ASSISTANT: Sorry, no reservation is available by your name.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.