You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Daniel Johnson here. I would like to visit BOS to meet my sister, can you help me to book a flight ticket from LGA?

ASSISTANT: Sure, may I know your travelling dates?

USER: My planning dates are start from 07/17 and return on 07/19.

ASSISTANT: Do you need any stopover in between the journey?

USER: I need a direct flight.

ASSISTANT: Please wait for a minute.

USER: Sure, take your own time.

ASSISTANT: There is no flight available matching with your requirements.

USER: It's ok, thank you for giving information.

ASSISTANT: Thanks for reaching us.