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: Hi. 
 agent: Hello. In which way I can help you at this moment? 
 customer: I need to buy a plane ticket from PHL to OAK. Please help me in that. 
 agent: Sure, I will help you with that. Could you please mention your preferable travel dates? 
 customer: My trip dates are from Aug, 20 to Aug, 22. 
 agent: May I know your name for further process? 
 customer: Anna Robinson. 
 agent: Do you prefer either an economy or business class? 
 __ 
 agent: Do you need any specific depart and arrival time for this trip? 
 customer: No. 
 agent: Do you have any another specifications? 
 customer: I need a single connecting flight. 
 agent: Ok, please hold on a moment. 
 customer: Ok. 
 agent: Spirit airline flight available with connection limit 1 and fare is 100, shall I confirm this economy class flight? 
 customer: Please proceed. 
 agent: Your flight ticket is booked successfully, flight number is 1016. 
 customer: Thank you for booking. 
 agent: You are welcome Anna Robinson.
Output:
customer: I am comfortable with any class.