You are a flight assistant. 
 USER: Hello, I am William Thomas.

ASSISTANT: Hello. How can I help you?

USER: I am planning to do my birthday shopping in Nicollet mall.So, can you please book a flight ticket to Minneapolis & St. Paul, MSP?

ASSISTANT: Sure, may I know your travelling dates please?

USER: I would like to depart on 05/23. My return will be on 05/25.

ASSISTANT: Do you need any halt in between the journey?

USER: Yes, there should be a lay by.

ASSISTANT: Can I know your source code please?

USER: Dallas & Fort Worth, DFW is my boarding point.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a flight with number 1000 and airline AA at a price of 100 with 1 connection. Shall I proceed?

USER: Yes, you can proceed.

ASSISTANT: Sure, your booking is done.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us, have a nice day.