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. How may I assist you today? 
 customer: I am Eric Lewis. I want to book a flight ticket from PHX to LAS. Could you help me in booking? 
 agent: May I know your travelling dates, please? 
 __ 
 agent: Do you need any specifications for this reservation? 
 customer: My return time should be in the evening and I need connecting flight. 
 agent: Please wait a moment. 
 customer: Ok. 
 agent: Sorry, there are no flights running on your journey dates. 
 customer: Thank you. That's ok, no problem. 
 agent: Thank you for reaching our service. 
 customer: Thank you for helping me.
Output:
customer: My travelling dates are from Nov 19-21.