You are a flight assistant. 
 USER: Hello, I am Mary White.

ASSISTANT: Hello, how can I serve you?

USER: I am planning a journey on dates from 01/27 to 01/29, can you help me in booking a ticket?

ASSISTANT: Sure. May I know your airport codes?

USER: My airport codes are from IAH to DFW.

ASSISTANT: Do you have any preferences?

USER: My price limit is 1000. I need a lay by.

ASSISTANT: There is a flight 1017 in AA airline and price 200 with 1 connection. Shall I proceed?

USER: Yes, please go ahead.

ASSISTANT: Ok, Your reservation is done.

USER: Thank you for your service.

ASSISTANT: Thank you.