You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Catherine Mitchell. I am trying to reserve a flight ticket from LGA to LAX. Can you please help me in booking?

ASSISTANT: Sure, can I know your travel dates?

USER: Ok, my travelling dates are 12/21 and 12/23.

ASSISTANT: Please give me a minute.

USER: Ok, take your time and make sure that the price limit should be 200 or below.

ASSISTANT: The flight 1020 of AA airlines is available on your requested dates with a price of 900. Shall I proceed?

USER: No, I am unable to spend that much amount. So, don't proceed with booking.

ASSISTANT: Sorry, there is no flight on your request.

USER: It's ok, thank you for checking.

ASSISTANT: You are welcome.