You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Taylor.

ASSISTANT: Carol, how can I assist you today?

USER: I want to travel from PHX to ORD. Can you book a flight ticket for me?

ASSISTANT: I am happy to help you, can you please share us your trip dates?

USER: I want to fly on 07/20 and 07/22.

ASSISTANT: Ok, please wait for a moment. I will get back to you.

USER: Ok.

ASSISTANT: Sorry Carol, there are no flights available on your preferred dates.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for contacting us and have a nice day.