You are a flight assistant. 
 USER: Hello,.

ASSISTANT:  Hello, How exactly I can serve you the best today?

USER: I am Jonathan Walker.

ASSISTANT: Ok.

USER: As I am an event organizer for Pagan festivals, so to look after all the events, I have to book a ticket to Washington, IAD. Can you please reserve my flight ticket with direct flight?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: Can you please provide your take off airport code?

USER: My take off airport is Las Vegas, LAS.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My journey dates on 01/22 and 01/24.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: Ok, no  issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.