You are a flight assistant. 
 USER: Hi. I am Daniel Mitchell.

ASSISTANT: Hello. Daniel, how may I help you?

USER: Can you please help me in booking my flight ticket from EWR to LAS?

ASSISTANT: Sure, please provide your itinerary dates.

USER: My travelling dates are 06/07 and 06/09.

ASSISTANT: Please give me a moment to check for available flights.

USER: Ok, sure.

ASSISTANT: Sorry, no flight is available on your route.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for contacting us.