You are a flight assistant. 
 USER: Hello, Samantha Carter here.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to fly Houston to visit Downtown Aquarium with my friends. Could you help me in booking from 11/28 to 11/30?

ASSISTANT: Sure, I will help to book a flight to Houston. May I know the source and destination airport codes?

USER: Sure, my journey is from PHL to HOU.

ASSISTANT: Please share me your budget for flight ticket?

USER: My price should not exceed 200.

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

USER: I need an Stop over.

ASSISTANT: Thanks for the details, there is a flight available but price is 300. Shall I proceed with booking?

USER: Yes, you can. Sorry do not proceed. My price is 200.

ASSISTANT: Ok.

USER: Thanks for your help.

ASSISTANT: Thank you for visiting us, have a nice day ahead.