You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am excited to visit the Grand Canyon in Las Vegas, Nevada. Can you find any flight available?

ASSISTANT: Oh! that sounds great, can I know your airport codes please?

USER: My nearest airport is AZ-PHX and the destination airport code is NV-LAS.

ASSISTANT: Could you please provide your travelling dates?

USER: I am planning my journey in the month of June. So, please find the flight availability in the dates 06/13 and 06/15.

ASSISTANT: For further proceeding, may I know your name please?

USER: My name is Patrick Thompson.

ASSISTANT: Sorry, there are no flights with your requirements.

USER: That's fine. Thank you for the information.

ASSISTANT: Welcome.