You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to travel from PHL to IAD. Can you help me to book a flight ticket?

ASSISTANT: Sure, can you please share your travel dates?

USER: I want to travel in the flight on Apr 29 and May 01.

ASSISTANT: May I know your connection limit?

USER: I want to travel in a connecting flight.

ASSISTANT: Do you have any other specification that you are looking for?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: Betty Green.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for contacting us.