You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to attend a Seminar in Phoenix. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are LAX and PHX.

ASSISTANT: Do you have any other specifications?

USER: I want to travel in business class flight.

ASSISTANT: Can you please share on what dates you are planning to travel?

USER: My travelling dates are July 10 and July 12. I want to departure on morning.

ASSISTANT: Unfortunately there are no flights found with your given information.

USER: Anyway, thanks for the information.

ASSISTANT: May I know your name please?

USER: My name is Frank Collins.

ASSISTANT: Thank you.