You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Daniel Turner here, I want to reserve my ticket from SFO to BOS, can you please help me?

ASSISTANT: Sure, I am happy to help you. Can you please provide me your travel dates?

USER: Sure, my planned dates of travel is from 10/08 to 10/10.

ASSISTANT: Ok, please wait for a while.

USER: Sure, but please make sure that the price limit is 200.

ASSISTANT: Sorry Daniel, there is no flight available on your preferred dates.

USER: Ok, that's fine. Anyways, thank you for your service.

ASSISTANT: You are welcome and have a nice day.