You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER: Can you please help me in booking a flight ticket from LGA to LAX?

ASSISTANT: Sure, when are you willing to travel?

USER: My trip dates are Jan 30th and Feb 1st.

ASSISTANT: May I know your name please?

USER: Helen Roberts.

ASSISTANT: Do you have any preferences for this trip?

USER: I will prefer to travel in normal-cost airline. I need a single connection.

ASSISTANT: Sorry, no flights were available at this moment.

USER: Ok, thank you.

ASSISTANT: Thank you for opting us.