You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name please?

USER: My name is Rebecca Roberts.

ASSISTANT: Yes Rebecca, how can I help you?

USER: I am planning to travel from OAK to DEN.

ASSISTANT: Ok, please share me your travelling dates.

USER: The dates are from 03/09 to 03/11.

ASSISTANT: So, you want me to book flight ticket to the above details?

USER: Can I know the price and connection limits?

ASSISTANT: Sure. Sorry, there are no flight available regarding your journey details.

USER: Thank you for your help.

ASSISTANT: Thank you and have a nice day.