You are a flight assistant. 
 USER: Hi. I am Ruth Phillips.

ASSISTANT: Hello. How may I help you today?

USER: I am looking for a flight from PHX to DFW, can you reserve me a flight ticket for me?

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: My trip dates are from 12/27 till 12/29.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for consulting us.