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: Hi, Brian here. 
 agent: Hello Brian!. How may I help you today? 
 customer: I was looking to book a flight ticket under the name Brian Martin. 
 agent: Alright, Mr. Martin. Where are you travelling to and from? 
 customer: It is a round trip from Boston to New York and back to Boston. In New York I would like it to be EWR airport please. 
 agent: Alright, and your travel dates? 
 customer: Departure is July 2nd and Arrival is July 4th. I meant return not arrival. Also, I would like to return early morning on 4th July since there is a function I have to attend for Independence Day celebration. 
 agent: Ah, I understand. Let me see what I can find for you. You're in luck! Spirit offers the route you are looking at for $100. Is this satisfactory? 
 __ 
 agent: Ah yes, traveling on holidays is much cheaper than the day before or after. 
 customer: You are right. 
 agent: Alright, you are all booked for flight 1010. Did you have any questions for me, or is there anything I may help you with? 
 customer: That is it for today. But if I have any other request, I have found the best place to ask help from. Thank you. 
 agent: I'm glad you enjoyed your service. We here at the booking agency hope you have a good day and wish you bon voyage!.

customer: Oh wow, my budget was around 500 so 100 is quite good. It's perfect. Book it.