You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me to find a flight availability from Las Vegas to reach Phoenix?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Thank you. I would like to travel on the dates of Jan 2nd and Jan 4th.

ASSISTANT: Please provide your airport codes.

USER: My source and destination airport codes are LAS and PHX.

ASSISTANT: Do you have any preferences about flight connections?

USER: Yes,  I need a single connecting flight for my journey.

ASSISTANT: Do you have any preferences about class?

USER: No, I didn't have any other preferences.

ASSISTANT: Please mention your name.

USER: My name is Ashley Walker.

ASSISTANT: There is no flights found under your preferable details.

USER: It's ok, not a problem with that. I will choose some other source to travel. Anyways thanks a lot for your time.

ASSISTANT: Welcome, have a great day.