You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to book a flight ticket from LGA to DTW. Could you help me?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: My travelling dates are from Apr 30 to May 02.

ASSISTANT: Ok, please mention your name.

USER: Robert Wilson.

ASSISTANT: Ok, do you have any specifications?

USER: No.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, no problem. Thank you.

ASSISTANT: Welcome, have a nice day.