You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Jessica Lee.

ASSISTANT: How may I guide you today?

USER: I am planning my holiday trip to travel Oakland to visit Oakland Zoo. Can you please help me in reserving the ticket from DFW to OAK?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: I am willing to take-off Nov 15 and again I will retrieve on Nov 17.

ASSISTANT: Do you have any specifications?

USER: Sure, I mostly prefer for single connection. Can I afford only 500.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Not a big deal, anyway thank you very much for your kind service.

ASSISTANT: Thank you for reaching us.