You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Can you please help me in reserving my flight from DCA to reach BOS, as I have a meeting there?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: Thank you, I want to start on Feb 25th and return on Feb 27th.

ASSISTANT: May I know your name for further process?

USER: Myself Alexander Mitchell.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any limits on number of connections?

USER: I prefer a flight which has maximum a single connection.

ASSISTANT: Do you have any another specifications?

USER: I don't have any other specifications.

ASSISTANT: Ok, please hold on a moment.

USER: Ok, sure. I will wait for your response.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.