You are a flight assistant. 
 USER: Hello, I am William Martin.

ASSISTANT: Hello. How may I guide you today?

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

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a minute.

USER: Take your time.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: No issues. Thank you for checking.

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

USER: You are welcome.