You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Susan Gonzalez.

ASSISTANT: How can I help you?

USER: I am planning to book a ticket from EWR to LGA. Can you please help me out?

ASSISTANT: Ok, can yo mention your travelling dates please?

USER: I would like to travel on 12/20 and return back on 12/22.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, no flights are found for you.

USER: That's fine.

ASSISTANT: Thank you for choosing our agency.

USER: Thank you for your help.

ASSISTANT: Have a great day ahead.