You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Rebecca King.

ASSISTANT: How can i assist you?

USER: I am planning to visit korean war veterans memorial in Washington DC. Can you help me to book a connecting flight?

ASSISTANT: Ok, may I know your travelling airport codes?

USER: My airport codes are EWR and DCA.

ASSISTANT: Can you please mention your travelling dates?

USER: My trip dates are Mar 14 and Mar 16.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no flights found on your route to reserve your ticket.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.