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. 
 agent: Hello. 
 __ 
 agent: How can I help you? 
 customer: I would like to change my existing reservation, can you please help me in changing? 
 agent: Sure, I will help you. Please, wait for a minute. 
 customer: Sure. 
 agent: Thank you for waiting, there is no reservation found on your name to change. 
 customer: Ok, not an issue. Thank you. 
 agent: Thank you for approaching us.

customer: I am Scott Lee.