You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Patricia Parker. Can you help me to book a flight from PHX to IAH?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travelling dates are 06/27 and 06/29.

ASSISTANT: Please give me a minute.

USER: Ok.

ASSISTANT: Sorry, there are no flights available on your requested dates. Thank you for contacting us, have a nice day.

USER: Thank you.