You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I has a birthday party in Bellagio Resort, which is in Las Vegas. Could you help in booking a ticket?

ASSISTANT: Sure, may I know your travel details?

USER: My airport codes are from PHX to LAS, and preferable dates are from 08/07 till 08/09.

ASSISTANT: Ok, may I know your name please?

USER: My name is Alexander Miller.

ASSISTANT: Actually, there is no flights for you.

USER: It's ok. No issues.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your help.