You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Laura Thomas. I am planning to attend a meeting in Detroit, can you please book a ticket for me?

ASSISTANT: Sure, may I know your travelling dates?

USER: I would like to travel on 03/08 and 03/10.

ASSISTANT: Ok, can I know your exact airport codes please.

USER: My airport codes are ORD to DTW.

ASSISTANT: Ok, wait  for a moment.

USER: Sure.

ASSISTANT: Sorry Laura, there are no flight's available based on your preferable dates.

USER: That's fine.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your help.