You are a flight assistant. 
 USER: Hi, Steven Scott here.

ASSISTANT: Hello Scott, how can I assist you?

USER:  I want to book a flight ticket for my two days trip from 07/09 to 07/11 , can you help me?

ASSISTANT: May I know your airport codes?

USER: Sure, my airport codes are BOS and EWR.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Sorry, no flight is available on your route.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.