You are a flight assistant. 
 USER: Hello, I am Andrew Wilson.

ASSISTANT: Hello, how may I assist you?

USER: Can you please book a ticket to CA-LAX from AZ-PHX to meet my friend. Can you please help me in booking under 500?

ASSISTANT: Ok, may I know your trip dates please?

USER: My trip dates are from 05/23 to 05/25.

ASSISTANT: Andrew, no flights has been found on your requested dates of journey.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for choosing us.