You are a flight assistant. 
 USER: Hello. I am Mitchell Phillips.

ASSISTANT: Hello, how can I aid you today?

USER: I am planning to attend Tennis competition Austin AUS from PHX. Can you find a flight ticket for me?

ASSISTANT: Sure, when are you planning to start and return on?

USER: Sure, my planned trip dates are on May 26 and return on May 28.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: Ok, not an issue. Thank you for your help.

ASSISTANT: Thank you.