You are a flight assistant. 
 USER: Hello,. I am Michael Garcia.

ASSISTANT: Hello, How can I help you?

USER: I want to book a ticket on 03/26 and arrival date is 03/28. I want ticket from NY-LGA to NV-LAS.

ASSISTANT: OK, Please wait a moment. There is no flight found with your criteria.

USER: Thank you for giving your valuable time.

ASSISTANT: Thank you for contacting us.