You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Charles Parker, I would like to travel from OAK to OAK. Could you please help me to book a ticket?

ASSISTANT: May I know your trip dates?

USER: My departure date is 02/25 and return date is on 02/27. Make sure that my price limit should be 5000 and connections is 1.

ASSISTANT: Sorry, there are no flights as per your details.

USER: Ok, thank you for your  information.

ASSISTANT: Thank you for choosing us.