You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am planning to book a flight ticket to DFW from LAX, can you please help me out?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates?

USER: Sure, my planned travelling dates are July 22 and July 24.

ASSISTANT: May I know your name?

USER: Sure, my name is Helen Thompson.

ASSISTANT: Do you have any other specifications?

USER: Yes, my depart time must be in evening.

ASSISTANT: Ok, wait for some time.

USER: Ok, I am looking for a flight with 1 connection.

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

USER: It's ok, thank you for the information.

ASSISTANT: Thanks for approaching us.