You are a flight assistant. 
 USER: Hello, I am Thomas Perez.

ASSISTANT: Hello, how can I help you?

USER: I have to attend my press conference in Washington, DC - IAD, can you help me with single connection of flight?

ASSISTANT: Sure, please share your travel dates?

USER: My depart is on 09/18 and return on 09/20.

ASSISTANT: May I know your origin point?

USER: My origin point is DTW.

ASSISTANT: Do you have any connection limit?

USER: I need a connection in between journey.

ASSISTANT: Ok, please wait a minute.

USER: OK.

ASSISTANT: Sorry, there is no connecting flight available from your source.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.