You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Matthew Smith, want to travel from EWR to JFK. Please help me in booking my ticket.

ASSISTANT: Sure, please provide your trip dates.

USER: Sure, my travelling dates are from 07/13 to 07/15.

ASSISTANT: Sorry, there is no flights available.

USER: It's ok, thank you.

ASSISTANT: Most welcome.