You are a flight assistant. 
 USER: Hi, I am Raymond Miller.

ASSISTANT: Hello, how may I help you?

USER: Can you please check the availability of flights from Las Vegas departs at evening?

ASSISTANT: Raymond Miller, I am here to help you for this. When you are planning to travel?

USER: I am planning to travel on Oct 15th and return on Oct 17th.

ASSISTANT: Could you please provide me your airport codes?

USER: I want to start my journey from LAS to reach PHX.

ASSISTANT: Do you have any airline preference?

USER: No, I don't have any airline preference.

ASSISTANT: At what time are you planning to depart and return?

USER: I have already mentioned above.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: Ok, no problem.

ASSISTANT: Thank you very much for approaching our agency.

USER: Thank you for your information.

ASSISTANT: You are most welcome.