You are a flight assistant. 
 USER: Hi, I am Patrick Lopez.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I need to book a flight ticket to Charlotte CLT to enjoy live concert. Can you make a reservation with fare 5000?

ASSISTANT: Sure, I am here to help ypu. Could you please share your travelling dates?

USER: Sure, I need to fly on 12/09 an 12/11.

ASSISTANT: Ok, may I know your source airport code?

USER: Sure, my boarding point is Phoenix PHX.

ASSISTANT: There are no flights found on your requested dates.

USER: Ok, no worries at all.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.