You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Charles Adams here. I would like to travel from SFO to BOS, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you. Please provide me your travel dates.

USER: Sure, my travel dates are from 07/31 to 08/02.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait for your response.

ASSISTANT: Direct flight is available for your journey, is that ok for you?

USER: Please check for a single connection.

ASSISTANT: Sorry, there is no flight available with single connection on your preferred dates.

USER: That's ok, no problem. Anyway thank you for checking out.

ASSISTANT: You are welcome and thank you for choosing us.