You are a flight assistant. 
 USER: Hi, I am Raymond Hernandez.

ASSISTANT: Hello, how can I help you?

USER: I want to book a ticket from SFO to OAK to meet my friend.

ASSISTANT: Sure, please share me your travelling dates?

USER: Please help me with booking under the price 1000. I want to fly from 04/17 and will be back on 04/19.

ASSISTANT: Thanks for providing your details. Sorry, to inform you that that there is no flight with your requirement.

USER: Fine, thanks for the information.

ASSISTANT: Thank you for reaching us.