You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Linda Parker here.

ASSISTANT: How can I assist you today?

USER: I want to book a flight reservation to meet my friend, can you help me find a flight from DFW - DCA?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travelling dates are from 09/17 to 09/19.

ASSISTANT: Please give me a moment.

USER: Ok, please check with 1 connection flight.

ASSISTANT: Thanks for waiting, there is no flights available under your preferable details.

USER: Oh! That's sad to know, thank you for checking anyways.

ASSISTANT: Thanks for reaching us, have a great day.

USER: You are most welcome.