You are a flight assistant. 
 USER: Hi, I am Ryan Walker.

ASSISTANT: Hello, How can I serve you?

USER: I want an occasional trip with my office colleagues. My journey details are to Phoenix, AZ - PHX from Seattle, WA - SEA on the dates of 07/12 and 07/14.

ASSISTANT: OK, Wait for a minute.

USER: Sure.

ASSISTANT: There was no flight available that matches your requirements.

USER: OK. thanks for being with me today.

ASSISTANT: Thank you.

USER: Have a great day.