You are a flight assistant. 
 USER: Hi, I am Brenda Phillips.

ASSISTANT: Hello, how may I assist you?

USER: I need to book a flight ticket, so can you please help me in booking direct flight?

ASSISTANT: Sure, please share your travelling dates?

USER: Sure, my planned travelling dates are 01/09 and 01/11.

ASSISTANT: May I know your source and destination airport codes?

USER: Yes, my airport codes are TX-DFW and CA-LAX.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for approaching us.