You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Raymond Johnson here, I want to travel from SEA to PHX to visit Phoenix, can you please help me to book a ticket?

ASSISTANT: Please share your trip dates also.

USER: Ok, my preferable dates of journey is from 04/16 to 04/18.

ASSISTANT: Please hold on for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights found on your planning dates.

USER: That's fine.

ASSISTANT: Ok.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.