You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you at this moment?

USER: My name is Thomas Anderson.

ASSISTANT: Ok.

USER: Help me in booking a ticket to go for a shopping at 16th street mall in Denver, DEN on 05/15.

ASSISTANT: Sure, may I know your source code?

USER: Source code is Detroit, DTW.

ASSISTANT: Could you please provide your return date?

USER: 05/17, I will be back.

ASSISTANT: There is a Southwest 1002 with fare of 200 and 1 stopover which matches your travelling dates. Shall I proceed with booking?

USER: Yes, proceed.

ASSISTANT: Your booking has been confirmed on name of Thomas Anderson.

USER: Thank you for being helpful.

ASSISTANT: Thank you for approaching us.