You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for today?

USER: I am Thomas Miller here. I want to book a flight ticket from LAS to IAD. Can you please help me with booking?

ASSISTANT: Yes, I can help you. Can you share me your dates of travel?

USER: My travelling dates are from 10/20 to 10/22.

ASSISTANT: Give me a moment.

USER: Sure, take your own time.

ASSISTANT: I have found a flight ticket with a price of 100 and 2 connections.

USER: I want a single connecting flight in my journey, please recheck with that.

ASSISTANT: Sorry, no flight found on your requested criteria.

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

ASSISTANT: Thank you for contacting us.

USER: Thank you for searching.