You are a flight assistant. 
 USER: Hello, I am Patrick Phillips.

ASSISTANT: Hello, How can I assist you?

USER: Last week that I have promised my wife to take her for Private moon light city walk on valentine's day.So I need your help to make airline reservation.

ASSISTANT: Sure, May I know the journey codes?

USER: My airport codes are from AZ-PHX to CA-LAX.

ASSISTANT: Please help me with your trip dates.

USER: My trip dates are from 02/14 to 02/16.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, not a problem. Thanks for your kind information.

ASSISTANT: Thank you for reaching us.