You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in booking a flight ticket from Washington, IAD to Philadelphia, PHL?

ASSISTANT: Sure, can you please share me your travelling dates?

USER: My journey dates are from Oct 26 to Oct 28.

ASSISTANT: Do you have any connection limit?

USER: I need a lay by in between journey.

ASSISTANT: May I know your name?

USER: My name is Nancy Brown.

ASSISTANT: Sorry, there were no flights with your given details.

USER: Ok, that's not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.