You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself Samuel Jones. I would like to do my further studies.I want to book a ticket.

ASSISTANT: Can I know your details of journey?

USER: Sure, my airport codes are from IAD to SFO. My travelling dates are from 08/15 to 08/17.

ASSISTANT: Sorry Jones, I didn't found any reservation basis on your details.

USER: Ok, thank you for your information.

ASSISTANT: You are welcome.