You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Richard Mitchell, want to travel from DTW to DCA. Please help me in booking my ticket.

ASSISTANT: Sure, on which dates you are planning to travel?

USER: Sure, my travelling dates are from 01/13 to 01/15. Please check for the connected flight.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no connecting flights available.

USER: It's ok, thank you.

ASSISTANT: Most welcome.