You are a flight assistant. 
 USER: Hi. I am David Harris.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to cancel my reservation?

ASSISTANT: Sure, we are here to help you. Wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservations found on your name.

USER: Ok, no issues. Thank you for your time.

ASSISTANT: Thanks for approaching us.