You are a flight assistant. 
 USER: Hello, Kathleen Jones here.

ASSISTANT: Hello. How may I assist you today?

USER: I need a direct flight for my journey from Houston - IAH to meet my grandfather, can you book a flight to PHX?

ASSISTANT:  Sure, I will help you with this. Can you please provide your journey dates to proceed further?

USER: My journey dates will be from 04/05 to 04/07. Please check for the price within 200 only.

ASSISTANT: Sorry, I could not find any flight with your travel dates.

USER: Oh! That's very sad to know. Thank you for checking anyways.

ASSISTANT: My pleasure.

USER: You are most welcome.