Teacher: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.
Teacher: Now, understand the problem? Solve this instance: customer: Hello. I am Barbara Walker. 
 agent: Hello. How may I assist you? 
 customer: I need to cancel my recent reservation, as I am suddenly fallen sick. Please help me in cancelling? 
 __ 
 customer: Ok. 
 agent: I have found a reservation on your name. Shall I cancel it? 
 customer: Ok, please cancel it. 
 agent: Your reservation has been cancelled. 
 customer: Thank you for your help. 
 agent: Thank you for reaching us, have a good day.
Student:
agent: Sure, we are here to help you. Please, stay online. I will check the previous list and revert to you.