You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Cynthia Young here.

ASSISTANT: How can I help you?

USER: I am looking for a flight ticket with price below 500. Can you book it?

ASSISTANT: May I know your desired travel dates please?

USER: My preferable dates for travel are 02/03 to 02/05.

ASSISTANT: Please share your preferred airport codes.

USER: I need a connecting flight.

ASSISTANT: Ok, may I know your airport codes please?

USER: My airport codes for boarding the flight are CLT to LGA.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for opting us. have a nice day.