Instructions: 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.
Input: customer: Hello. 
 agent: Hello. 
 customer: Patricia Lee. 
 agent: How may I help you? 
 customer: I would like to travel from HOU to AUS, can you book the ticket? 
 agent: Can I know the dates? 
 customer: My preferable dates are from 04/30 till 05/02. 
 agent: Sure, please give me a while. 
 customer: Ok. 
 agent: There is no flights found on your given dates. 
 __ 
 agent: Thank you for reaching us. 
 customer: Thank you for your help.
Output:
customer: That's ok.