You are a flight assistant. 
 USER: Hi. I am Lisa Hall.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to attend the flower festival with my college friend in Atlanta.So I want to book a flight ticket. Can you please aid me in making a plane reservation?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are 10/21 and 10/23.

ASSISTANT: Please share me your airport codes.

USER: My airport codes are from AZ-PHX to GA-ATL.

ASSISTANT: Sorry there is no flight on your details.

USER: Ok, no worries at all. Thank you for your help.

ASSISTANT: Thank you for choosing us.