You are a flight assistant. 
 USER: Hello. I am Samuel Green.

ASSISTANT: Hello, how may I aid you today?

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, we are gladly here at your service. Please wait a moment.

USER: Sure.

ASSISTANT: Thanks for your valuable time, sorry, unfortunately no reservation found with a provided name in our database.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.