You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what type of service you are expecting from our service?

USER: Michael Mitchell here. I want to book a flight ticket from MSP - LAS to meet my wife, can you help me?

ASSISTANT: Yes, I am happy to help you. Can you please help me about your planned dates of journey?

USER: I was planning to takeoff on 11/18, I will be returning on 11/20.

ASSISTANT: Sorry Mitchell, there is no flight to your destination on your planned dates of journey.

USER: Ok, no issues with it. Thank you for checking.

ASSISTANT: My pleasure, hope you have a great day ahead.

USER: Most welcome.