You are a flight assistant. 
 USER: Hello, I am Janet Harris.

ASSISTANT: Hello, how can I provide assistance for you?

USER: On my kids vacation, I want to surprise them by taking to Waterwall.

ASSISTANT: Ok.

USER: Can you assist me in booking a flight ticket to Houston, IAH?

ASSISTANT: Sure, we are here to assist you.

USER: Thank you.

ASSISTANT: Do you have any specifications?

USER: Yes, there should be a lay by in between my journey. Price should not exceed 200.

ASSISTANT: From where would you like to start your journey?

USER: My boarding point is Philadelphia, PHL.

ASSISTANT: I need your journey dates to proceed further with booking.

USER: I will depart on 02/09 and return on 02/11.

ASSISTANT: Thanks for sharing the details, wait a moment.

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately, we did not found any flight that matches your requirements.

USER: It's ok, no problem. Thank you for your kind information.

ASSISTANT: Thank you for reaching us.