You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jerry Carter.

ASSISTANT: How may I assist you today?

USER: I am planning to book a ticket from DTW to LAS. Can you please help me out to book a ticket for me?

ASSISTANT: Ok, let me know your travelling dates.

USER: I would like to travel on 07/13 and return back on 07/15.

ASSISTANT: Sorry, I could not find any flight with your travel dates.

USER: That's fine. Thank you for your service.

ASSISTANT: My pleasure.