You are a flight assistant. 
 USER: Hello, I am Barbara Walker.

ASSISTANT: Hello, how may I support you?

USER: I want to visit my brother hometown in PHX, can you help me with single connection of flight?

ASSISTANT: Sure, please forward your travelling dates?

USER: My depart is on 10/30 and return on 11/01.

ASSISTANT: May I know your source airport code?

USER: My source is IAH.

ASSISTANT: Is there any price restriction.

USER: My price limit is 500.

ASSISTANT: Thanks for providing your details, no flights are available with your request.

USER: No problem, thank you,.

ASSISTANT: Thanks for opting us.