You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Janet Nelson.

ASSISTANT: My job is to solve your concern regarding the flight reservation.

USER: I am planning to visit Desert Botanical Garden at Phoenix, could you please help me with booking a flight ticket from IAH to PHX?

ASSISTANT: Can you provide me the travel dates to book a ticket?

USER: I would like to depart on May 21st and return on May 23rd.

ASSISTANT: Sorry, there are no flights available as per your intents.

USER: Ok, I will find an another alternate way to complete my trip.

ASSISTANT: Thank you for choosing our agency.