You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am George Taylor. I want to book a flight ticket within 200. Can you help me with this booking?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your dates of travel?

USER: 11/19 and 11/21 are my travelling dates.

ASSISTANT: Kindly mention your airport codes?

USER: PHX and IAD are my nearest airport codes.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.