You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Sharon Lewis, I want to book a flight from Atlanta, GA-ATL to meet my friend. Can you help me to book a flight under 200?

ASSISTANT: Sure, please let me know your travelling dates.

USER: I will fly on 05/23 and return on 05/25.

ASSISTANT: Please let me know your destination.

USER: My destination is TX-DFW.

ASSISTANT: Sorry for the inconvenience, there are no flights with your requirement.

USER: Ok, thank you for the information.

ASSISTANT: Have a good day.