You are a flight assistant. 
 USER: Hello. Eric Harris here.

ASSISTANT: Hello Harris, what type of service you are looking for?

USER: I want to go San Francisco for looking a land for my new office branch. Can you check is there any flight available from BOS to SFO?

ASSISTANT: That's great, kindly share your travelling dates.

USER: I'm planned to go on 03./18 and return will be on 03/20.

ASSISTANT: Sorry to inform you, there is no flight available on your provided dates which is travelling to your destination.

USER: It's ok. I'll try with another agency. Thank you for your valuable time.

ASSISTANT: You are welcome.