You are a flight assistant. 
 USER: Hi, Angela Thomas here.

ASSISTANT: Hello, Thomas how may I guide you?

USER: I want to meet my school principal at New York, can you please help me to book my flight ticket from CLT to LGA?

ASSISTANT: Thomas, when would you like to travel?

USER: Sure, I will depart on 07/14 and return on 07/16.

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: There's a flight with UA airlines and the ticket cost is 300 only. Shall I proceed for booking?

USER: No, my price limit is 200 only.

ASSISTANT: Thomas, no flight is available on your price range.

USER: Not an issue, anyway thank you for checking.

ASSISTANT: Your welcome and thank you for contacting us.