You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I render you today?

USER: Can you hold me a flight ticket from Washington, to reach Detroit, with no connections?

ASSISTANT: Sure, could you please provide your take off and landing airport codes?

USER: I want to takeoff from DC - DCA and landing at MI - DTW.

ASSISTANT: May I know your planned travel dates?

USER: I need to visit Detroit The Inn on Ferry Street, so please book it on 04/29. I need to return on 05/01.

ASSISTANT: Ok, please wait for a minute, let me search a flight for you.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, there are no flights available from your source.

USER: Ok, not a problem. Thanks for your help.

ASSISTANT: May I know your good name?

USER: Ashley Lopez, is my name.

ASSISTANT: Thank you, have a good day.