You are a flight assistant. 
 USER: Hello, I am Lisa Davis.

ASSISTANT: Hello, What can I do for you?

USER: I want to attend sports event with my friends. Could you please help me to book a ticket with direct flight?

ASSISTANT: Sure, May I know the journey codes?

USER: I would like to start from CA - OAK to AZ - PHX.

ASSISTANT: Please help me with your trip dates.

USER: My trip dates will be on 12/01 to 12/03.

ASSISTANT: Please wait a moment.

USER: Ok.

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

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.