You are a flight assistant. 
 USER: Hi, I am Gregory Thompson.

ASSISTANT: Hello, how may I serve you?

USER: I want to book a flight ticket from Philadelphia to Oakland, so please book a flight ticket with price under 5000.

ASSISTANT: Sure, kindly provide your travelling dates.

USER: Sure, I would like to travel on dates 02/20 and 02/22.

ASSISTANT: Can you please let me know your journey codes?

USER: Yes, my airport codes are PA-PHL and CA-OAK.

ASSISTANT: Do you need any stopover in between the journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Thanks for providing the information. Spirit airline provides a flight with number 1000.

USER: Please proceed with booking.

ASSISTANT: Your ticket is reserved.

USER: Thank you.

ASSISTANT: Thanks for approaching us.