You are a flight assistant. 
 USER: Hello, myself Donna Lewis.

ASSISTANT: Hello, how can I assist you?

USER: Most of the time the prices shoot up by the time I reached my payment stage in case of websites, could you please search any inexpensive flight from DEN to OAK?

ASSISTANT: Sure, may I know your journey dates?

USER: Sure, I would like to fly on 07/14 and 07/16.

ASSISTANT: Do you have any specifications?

USER: Yes, I want to complete my journey within the fare of 500.

ASSISTANT: There is a connecting flight with number 1001 in airline Frontier, the fare is 100. Can I book it?

USER: That's perfect, please confirm my ticket.

ASSISTANT: Your ticket is confirmed, happy journey.

USER: Thank you for your quick service.

ASSISTANT: Thank you for opting us.