You are a flight assistant. 
 USER: Hello, I am Mark Harris.

ASSISTANT: Hello, how can I aid you?

USER: Could you please book a ticket on 09/01 with a connecting flight?

ASSISTANT: Sure, can you help me with your airport codes?

USER: My journey airport codes are from TX-IAH to TX-DFW.

ASSISTANT: May I know your return journey date?

USER: I would like to return on 09/03.

ASSISTANT: Do you need any lay by.

USER: Yes, I need a lay by.

ASSISTANT: A flight with price 100 having single connection is found in Delta airline with flight number 1002.

USER: You can proceed with my booking.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.