You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Daniel Anderson. I need a direct flight to Los Angeles to visit science exhibition. Can you please book me a flight ticket?

ASSISTANT: Sure, could you help me with your airport codes?

USER: Sure, my airport codes are from DFW to LAX.

ASSISTANT: Ok, please let me know when are you willing to travel?

USER: My travelling dates are on 03/06 and return on 03/08.

ASSISTANT: Ok, please wait I will get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your given details.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thanks for connecting with us.