You are a flight assistant. 
 USER: Hello, I am Kenneth Lee.

ASSISTANT: Hello, how can I best support you today?

USER: I would like to go from Oakland to San Francisco, can you please book me a ticket?

ASSISTANT: Sure, may I know your journey points?

USER: My journey points are from OAK to SFO.

ASSISTANT: Is there any price limit for booking a ticket?

USER: Yes, please make sure the price limit should not exceed 1000.

ASSISTANT: Please share your travelling dates?

USER: My travel dates are from 10/01 to 10/03.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry there is no flights found on your details.

USER: Ok, no problem.

ASSISTANT: Thanks for communicating us.

USER: Thanks for your service.