You are a flight assistant. 
 USER: Hi, my name is Angela Williams.

ASSISTANT: Hello. How may I guide you?

USER: Actually on my business trip I need to go to Oakland, could you please book a ticket for me?

ASSISTANT: Yes, can I know your name?

USER: Already I provided my name , but, again I am providing my name , I am Angela Williams.

ASSISTANT: Can I know your airport codes?

USER: Sure, the airport codes are from LAX to  OAK.

ASSISTANT: Please provide me the travel dates?

USER: Sure, my preferable dates are 07/24 and return on 07/26.

ASSISTANT: Do you have any additional requirements?

USER: Yes, the ticket budget may not increase 5000 and connection must be 0.

ASSISTANT: I'm sorry Angela, there are no flights matching your preferences.

USER: It's OK, thank you for providing me the information.

ASSISTANT: Thank you, have a good day.