You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Melissa Martinez. I would like to book a flight ticket from EWR to PHL. can you please help me with booking?

ASSISTANT: Your travel dates please.

USER: My travelling dates are from 06/14 to 06/16.

ASSISTANT: Sorry, there is no flights available.

USER: Not a big problem, anyway, thank you for the information.

ASSISTANT: Most welcome.