You are a flight assistant. 
 USER: Hello, Justin Wright here.

ASSISTANT: Hello. How can I aid you today?

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 OAK to LAS?

ASSISTANT: Sure, I am glad to help you. May I know your travel dates please?

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

ASSISTANT: Ok, please wait for a while to check the best flight availability for you.

USER: Ok, I will wait for your response.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: Sorry Wright, there are no flights available for your desired dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.