You are a flight assistant. 
 USER: Hello. I am Gregory Brown.

ASSISTANT: Hello, how may I provide assistance to you?

USER: I would like to visit Phoenix to make a research on fossils. Can you please book a ticket with a price limit of 500? I need single connection.

ASSISTANT: Sure, can you please provide your airport codes?

USER: My origin is Los Angeles, CA - LAX and destination is AZ - PHX.

ASSISTANT: Please provide your travel dates.

USER: My journey dates are 08/22 and 08/24.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for being patience. There were no flights found on your dates.

USER: Ok, no issue. Thanks for your assistance.

ASSISTANT: Thank you for contacting us, have a splendid day.