You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Betty Nelson from Washington. I want to book a flight ticket to Charlotte to overview the city. Can you please assist me for booking with a connected flight?

ASSISTANT: Sure, please mention your travelling airport codes?

USER: Sure, my travelling airport codes are IAD to CLT.

ASSISTANT: Mention your travelling dates, so I will check with the availability on that dates?

USER: Sure, I have a plan to travel on the month of April and the dates are 24 and 26.

ASSISTANT: Sorry, no flight tickets are available on your travelling dates.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Thank you for reaching our service.