You are a flight assistant. 
 USER: Hi. I am Catherine Green.

ASSISTANT: Hello, How can I assist you?

USER: I want to attend my family function at Houston, HOU. can you help me in booking from PHX?

ASSISTANT: Sure, May I know the travel dates?

USER: My travelling dates are from Mar 16 to Mar 18.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.