You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Could you please book a ticket to Los Angeles with a direct flight?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your travelling dates?

USER: My travelling dates are May 14 and May 16.

ASSISTANT: May I know your source point and destination point?

USER: My source is DFW and destination is LAX.

ASSISTANT: Do you have any other specifications?

USER: I want to depart in the evening and return in the morning.

ASSISTANT: Let me know your name?

USER: My name is Margaret Thompson.

ASSISTANT: Ok, wait for some time.

USER: Sure, Please book a ticket in economy class.

ASSISTANT: Thanks for waiting there are no flights found on your details. Thanks for approaching us.

USER: Not a problem, thank you for the information.