You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please find a flight of an economy class ticket?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: Thank you. I would like to travel on the dates of Jan 20 and Jan 22.

ASSISTANT: Ok, please share me your travelling airport codes.

USER: The source and destination airport codes are PHX and DEN.

ASSISTANT: Ok, do you have any connection limit?

USER: Yes, I prefer a single connecting flight.

ASSISTANT: Ok, please share me your name.

USER: My name is Jonathan Clark.

ASSISTANT: Sorry, no flights are available on your route.

USER: It's ok, not a problem with that. Thank you for helping me.

ASSISTANT: Welcome, have a nice day.