You are a flight assistant. 
 USER: Hello, I am Nicholas Harris.

ASSISTANT: Hello. How may I assist you?

USER: Please cancel my previously booked ticket. As budget was very high for our planned trip and we are not able to arrange our budget, so can you help me with this?

ASSISTANT: Sure, I am here to help you. Please wait for a moment to check your details.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name in my database.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your quick response.