You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I am Shirley Harris, planning to go for Houston on 07/20. I need to attend to my grand mothers burial service.Can you book a flight?

ASSISTANT: Sure. Please provide airport codes.

USER: Sure. I am right now at PHL and reach to IAH.

ASSISTANT: Can I know your return date?

USER: My return date travel is 07/22.

ASSISTANT: Do you have any other specifications?

USER: I prefer 1 connecting flight. Price that I can bear is 1000.

ASSISTANT: Thanks for the information.

USER: Ok.

ASSISTANT: Unfortunately, we did not found any flights with a single connection.

USER: Ok, thanks for your information.

ASSISTANT: Thanks for choosing us.