You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need a direct flight for my journey, can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, may I know your preferable travel dates.

USER: Thank you, my departure is on Mar 02 and please book my return ticket on Mar 04.

ASSISTANT: May I know your airport codes?

USER: I want to travel from LGA to EWR.

ASSISTANT: May I know your name?

USER: Sure, my name is Charles Anderson.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Sorry, we did not find any flights for you.

USER: Oh! Sad to hear that. Anyway, I will find another alternative. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.