You are a flight assistant. 
 USER: Hi, I am Jason Adams.

ASSISTANT: Hello, how can I aid you today?

USER: I want to book a flight ticket from Oakland to Las Vegas. Can you help me in this?

ASSISTANT: Sure, I will help you, could you please help me with your travelling dates?

USER: My trip dates are 07/10 - 07/12.

ASSISTANT: Could you please help me with your airport codes?

USER: I want to fly from CA - OAK to reach NV - LAS.

ASSISTANT: Please mention your price limit.

USER: I can afford up to 500 only.

ASSISTANT: Sorry Jason Adams, no flights found on your requested dates.

USER: It's ok, not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you.