You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I assist you?

USER: I am James Thomas. I want to book a flight ticket to go for a Grand Canyon Adventure in Boston, MA - BOS. Can you please book a flight ticket from Phoenix, AZ - PHX?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My travelling dates are 01/26 - 01/28.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.