You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Joshua Wright. I want to travel from AZ-PHX to CA-OAK to attend my sister wedding.

ASSISTANT: Sure, when are you willing to travel?

USER:  Can you book a direct flight? My travel dates are 07/20 and 07/22.

ASSISTANT: Do you have any limitations in price?

USER:  Make sure price should not exceed 200.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER:  Thank you for your help.

ASSISTANT: Thank you for opting us.