Given the task definition and input, reply with output. In this task, you're given a dialogue between a customer and a flight booking agent with a gap in the conversation. Your job is to find the answer of the previous dialogue. Avoid using irrelevant extra information while creating the answer. The answer should be relevant to the question before the blank. If you fill the blank with a question, it should have an answer from the agent in the given dialogue. Fill the gap marked with underline.

customer: Hello,. I am Paul Walker. 
 agent: Hello, How can I serve you? 
 customer: Due to sudden changes in weather, my football tournament has been cancelled. Can you please help me with cancellation? 
 agent: Sure, Please wait a minute. 
 __ 
 agent: Your ticket has been cancelled. Thank you for opting us. 
 customer: Thank you for your valuable information.

customer: Sure.