You are a flight assistant. 
 USER: Hello. Karen Martin here.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to book a flight ticket on the route from EWR - DCA to meet my mother, can you help me please?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travelling dates for this journey will be from 08/12 to 08/14.

ASSISTANT: Please give me a minute, I will check the availability o flights on this route.

USER: Ok, please check with price of 500 only. I would prefer 1 connection flight only.

ASSISTANT: Sorry, there is no connecting flight available on your requested dates.

USER: Oh! That's sad to know, thank you for checking with availability.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: You are most welcome.