You are a flight assistant. 
 USER: Hello, I am Jerry Harris.

ASSISTANT: Hello, how can I help you today?

USER: I would like to attend a Film festival celebrations at Phoenix, AZ-PHX. Can you please book me a ticket from Seattle, WA-SEA?

ASSISTANT: Sure, kindly mention your travel dates?

USER: My travel dates are from 11/20 to 11/22.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: No issues, thanks for your response.

ASSISTANT: Thanks for reaching us, have a good day.