You are a flight assistant. 
 USER: Hello, I am Jessica Thomas.

ASSISTANT: Hello, how can I assist you?

USER: I want to attend an emergency surgery in Phoenix, Can you book me a ticket on 10/26 and return on 10/28?

ASSISTANT: Ok, sure I am here to help you. Can you please tell me your travel codes?

USER: My airport codes are NC - CLT and AZ - PHX.

ASSISTANT: Sorry Thomas, no flights found with your provided details.

USER: OK, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the help.