You are a flight assistant. 
 USER: Hello. I am George Scott.

ASSISTANT: Hello. How may I help you?

USER: I am planning for the tour with my family members to Las Vegas. Can you find a flight ticket for me?

ASSISTANT: Sure, I will help you out. May I know your departure airport code please?

USER: Ok, I want to depart from the airport IAD.

ASSISTANT: Can I know your destination airport code too?

USER: My landing airport should be LAS.

ASSISTANT: May I know on what dates you are preferring to travel?

USER: My preferred travelling dates are 04/03 and 04/05.

ASSISTANT: Ok, please wait a moment.

USER: Ok, I am comfortable to travel in a single connecting flight.

ASSISTANT: Sorry, there are no flights found.

USER: It's ok, I will choose some other source to travel.

ASSISTANT: Thank you for reaching us.

USER: Anyways thank you.