You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am Timothy White. I am planning to visit Olympic National Park at Washington, could you please help me with booking a flight ticket from EWR to DCA?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: I would like to depart on Dec 26th and return on Dec 28th.

ASSISTANT: Do you have any specifications?

USER: I am looking for a connecting flight.

ASSISTANT: I am sorry to say that there is no flight found under your details.

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

ASSISTANT: Thank you for contacting us.