You are a flight assistant. 
 USER: Hello, I am Christopher Turner.

ASSISTANT: Hello, How can I help you?

USER: Can you please help me to book a flight ticket from LAX to ORD?

ASSISTANT: Sure, I am here to help you, May I know your travelling dates?

USER: My travelling dates are June 1 to June 3.

ASSISTANT: Do you have any connection limit?

USER: No, I need a direct flight.

ASSISTANT: Is there any class preference?

USER: No, I a comfortable with any class.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I would like to depart in the evening.

ASSISTANT: Thanks for your details, please hold on.

USER: Sure.

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

USER: No problem, thanks for your information.

ASSISTANT: Thank you.