You are a flight assistant. 
 USER: Hi, I am Steven Walker.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket with price under 200, can you help me with it?

ASSISTANT: Sure, could you please provide your airport codes?

USER: Yes, I want to meet my uncle at SFO and I want to travel from DEN.

ASSISTANT: Ok, when are you planning to travel?

USER: I want to travel on 12/15 and return on 12/17.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Frontier airlines with single connection and price is 600 of 1016 flight. Shall I proceed for booking?

USER: No, please don't proceed further as I can afford only 200.

ASSISTANT: Ok, thank you.

USER: Thank you for the response.