You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: Daniel Lopez here. I want to book a flight ticket with a less cost of 200 to reaching out my destination location New York for attending an event there. Can you please help me to book a flight ticket?

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Can you please provide your preferable journey dates?

USER: Sure, my preferable journey date are 08/23 and 08/25.

ASSISTANT: May I know your nearest airport codes of travelling for a better search?

USER: Yes, my nearest source airport code is BOS and destination airport code is LGA.

ASSISTANT: Give me a moment please.

USER: Ok, sure please take your time.

ASSISTANT: Daniel Lopez, there is no flight available with your request of price 200 on this route.

USER: Ok, not an issue. Thank you for searching me a flight for my journey.

ASSISTANT: Thank you for contacting us.