You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you today?

USER: David Jones here, booked a ticket for a small trip, but due to some urgency, I need to cancel my reservation, can you please help me?

ASSISTANT: David Jones, let me check with your previous reservation for a moment.

USER: Sure, take your time to check.

ASSISTANT: Sorry for your inconvenience but no reservation was found by your name.

USER: That's ok. Thank you for your information.

ASSISTANT: Thank you for choosing us, keep reaching for your further bookings. Welcome.

USER: Welcome.