You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Betty Lewis here.

ASSISTANT: How may I assist you today?

USER: I would like to visit Houston to meet my friend, please help me in booking a ticket from PHX to IAH.

ASSISTANT: Sure, let me know your travel dates please?

USER: My planned travel dates are on Feb 27 and Feb 29.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Do you need any other specifications?

USER: No more specifications. Please find the availability of flights.

ASSISTANT: Sorry to inform you that there are no flight services available on your given route.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thanks for reaching us.