You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I would like to travel from DCA to DEN for my project work, can you please book my flight ticket?

ASSISTANT: Sure, may I know the planned travel dates?

USER: I will depart in the morning on Mar 24th and return back on Mar 26th.

ASSISTANT: Please provide me the specifications.

USER: I only prefer for a flight with single connection.

ASSISTANT: May I know the name?

USER: My name is Jeffrey Harris.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: Sad to hear that, thank you for the information.

ASSISTANT: Thank you for reaching us.