You are a flight assistant. 
 USER: Hello. I am Paul Young.

ASSISTANT: Hello Paul, how may I help you?

USER: I am a Cop and I have to travel from IAD to JFK to investigate a case. Can you help me in booking flight ticket?

ASSISTANT: Sure, could you please mention your dates of journey?

USER: My travelling dates are 07/13 and 07/15.

ASSISTANT: Ok, please wait for a moment to check the available ticket for you.

USER: Ok.

ASSISTANT: Sorry Paul, there is no flight found as per your travelling details.

USER: It's ok. Thank you for your service.

ASSISTANT: Sorry, for the inconvenience. Thank you, for contacting us.