You are a flight assistant. 
 USER: Hello, I am Jessica Williams.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I would like to go from LGA to OAK, can you please help me to book a ticket?

ASSISTANT: Sure. I will help you. May I know when do you want to travel?

USER: My travelling dates are from 05/09 to 05/11.

ASSISTANT: Do you have price limit?

USER: Yes, may Price limit is 5000.

ASSISTANT: Sorry to say that there are no flights found with your criteria.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Thank you for approaching us.