You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Nancy Wilson. I am planning to book a ticket from LGA to LAX. Can you please help me out to book a ticket for me?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: I would like to travel on Feb 21 and return back on Feb 23.

ASSISTANT: Give me a moment.

USER: I am planning to go on direct flight.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for contacting us.