You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Sharon Thompson. I want to book a flight ticket from Washington, DC-IAD to Philadelphia, PA-PHL with my family. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to depart on 09/22 and arrival on 09/24.

ASSISTANT: Sorry there is no flight on your details.

USER: No worries, thank you for the information.

ASSISTANT: Thank you.