You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me book a direct flight from Houston to Phoenix on the name of Karen Lopez?

ASSISTANT: Sure, how much do you want to spend on your ticket?

USER: I can spend up-to 500.

ASSISTANT: Ok, please provide your source and destination airport codes.

USER: My source is IAH and destination is PHX.

ASSISTANT: Ok, Can you please provide your travelling dates?

USER: They are planned to be on 07/01 and 07/03.

ASSISTANT: Ok, please standby.

USER: Ok.

ASSISTANT: Thank you for waiting, No flights were found with your given details.

USER: Thank you for the information.

ASSISTANT: Thank you for choosing us.