You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Edward Wright.

ASSISTANT: How shall I help you?

USER: I want a flight with 1 connection.

ASSISTANT: Sure.

USER: My price limit should not exceed 5000, can you book a ticket for me?

ASSISTANT: Ok. Please provide your journey schedule?

USER: I want to conduct an event for special children for their education and food at Jonathan's Place. My journey dates are from 07/29 to 07/31. My airport codes are from AUS to IAH.

ASSISTANT: I'm sorry, there is no flight available.

USER: Ok.

ASSISTANT: Thanks.