You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Gary Clark. Can you please assist me in booking a flight ticket from EWR to BOS?

ASSISTANT: Sure, may I know your travel dates?

USER: My planned journey dates are May 10 and May 12.

ASSISTANT: At what time do you like to leave?

USER: I would like to depart in the afternoon time.

ASSISTANT: Do you have any other specifications?

USER: I need a flight having single connection.

ASSISTANT: I am sorry to inform you that there is no flight on your route.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you for your response.