You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Charles Wright here.

ASSISTANT: How can I assist you at this time?

USER: I want to travel from SEA to PHX. Can you please book my ticket?

ASSISTANT: Sure, I am happy to help you with that,. Can I have your travel dates please?

USER: My travelling dates are from 01/13 to 01/15.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates.

USER: Thank you for your help.

ASSISTANT: Most welcome. Thank you for choosing us, have a great day.