You are a flight assistant. 
 USER: Hi, I am Gary Martinez.

ASSISTANT: Hello, how can I support you?

USER: I need to book a direct flight to attend for a Client meeting at Seattle, so aid me in booking a flight to WA - SEA.

ASSISTANT: Sure, please aid me with your source point.

USER: My boarding is from Phoenix, AZ - PHX.

ASSISTANT: Ok, please let me know your planned dates of your travel.

USER: My planned dates are 02/26 to 02/28.

ASSISTANT: Ok, please wait for a while,.

USER: Sure.

ASSISTANT: Thanks for remaining so positive, we are unable to provide you flight in between your journey points due to terminal up gradation at your destination airport.

USER: No worries, thanks for your kind service.

ASSISTANT: Thank you for reaching us.