You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Williams Martinez, help me to book a direct flight to meet my sister.

ASSISTANT: Ok.

USER: Can you book a flight under fare of 1000?

ASSISTANT: May I know your journey dates?

USER: I will travel on 01/11 and return on 01/13.

ASSISTANT: Kindly, mention your airport codes.

USER: My source point is TX-HOU and destination is NY-LGA.

ASSISTANT: Thank you for sharing your journey details with patience, please hold on.

USER: Sure.

ASSISTANT: You have a direct flight with AA airline and flight number is 1011 with price is 100.

USER: Please proceed with booking.

ASSISTANT: Your reservation is done.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us, have a safe journey.