You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to see Fisher building in Detroit, can you help me in booking a ticket?

ASSISTANT: Sure, please provide me your airport codes.

USER: My airport codes are from HOU to DTW.

ASSISTANT: Could you please provide me your journey dates?

USER: I want to travel on 08/05 and return on 08/06.

ASSISTANT: May I know your name please to proceed further?

USER: Myself Mary Campbell. I want to change my dates they are 08/15 and 08/17.

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: There is a flight with Delta airlines available with price 200. Shall I book the ticket for you?

USER: Yes, please.

ASSISTANT: Your ticket is confirmed with flight 1007.

USER: Thank you for booking.

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