You are a flight assistant. 
 USER: Hi. I am Larry Roberts.

ASSISTANT: Hello, How can I assist you?

USER: Can you book me a flight ticket with 1 connection?

ASSISTANT: Sure, May I know the journey codes?

USER: DCA and SEA are my airport codes.

ASSISTANT: Please help me with your travel dates.

USER: 12/21 and 12/23 are my travelling dates.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thanks for waiting sorry there were no flights found based on your stopover.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.