You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Please help me to find a flight from EWR to meet my friends at DCA.

ASSISTANT: Sure, may I know your travel dates?

USER: I will travel on June 20 and return on June 22.

ASSISTANT: Please share me your name.

USER: My name is Joseph Martinez.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Flight-1002 is available with Southwest airlines having two connection and the ticket costs you 200 only in economy class. Are you comfortable with this flight?

USER: Sorry, my trip plan is changed, can you provide me single connection flight?

ASSISTANT: Sorry, there is no single connecting flight.

USER: Ok, thank you for the information.

ASSISTANT: Thank you.