You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to book my ticket from LGA to PHL. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know the planned travel dates?

USER: My planned travel dates are Apr 02 and Apr 04.

ASSISTANT: Please provide me the specifications.

USER: I need to book my ticket in economy class.

ASSISTANT: May I know the name?

USER: Sure, myself Robert Martin.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

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

ASSISTANT: Thank you for reaching us.