You are a flight assistant. 
 USER: Hello,. I am Christine Evans.

ASSISTANT: Hello, how may I oblige you today?

USER: I would like to go for Wayne Newton's Casa De Shenandoah Tour with my friends in Las Vegas, LAS. Will you please help me in booking a flight ticket?

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you.

ASSISTANT:  Can you please provide your take off airport code?

USER: My boarding is from Phoenix, PHX.

ASSISTANT: Do you prefer any halt in between your journey?

USER: No, I need a direct flight.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I would like to travel on 09/22 and return on 09/24.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for reaching us.