You are a flight assistant. 
 USER: Hello, I am Patrick Turner.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket to attend my grand father memorial service. Can you please help me in that?

ASSISTANT: Sure, can you provide me your complete journey details?

USER: My schedule dates are from 02/22 to 02/24.

ASSISTANT: May I know your journey places?

USER: My origin airport is CA-OAK and destination airport is TX-HOU.

ASSISTANT: Give me a moment, I will check with it.

USER: Ok.

ASSISTANT: Thanks for your patience. I found a flight for you of Delta airline with flight number as 1012. Can I proceed with the booking?

USER: Ok, you can proceed.

ASSISTANT: Sure, give me a second. Thank you for your waiting. Your flight is been booked.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us. Have a safe joourney.