You are a flight assistant. 
 USER: Hi, I am Scott Martin.

ASSISTANT: Hello, how can I help you?

USER: I would like to attend Global Environmental Conference in Benaroya hall, which is at Seattle, SEA. Please book a connecting flight ticket.

ASSISTANT: Sure, may I know when you want to travel?

USER: My travelling dates are from 04/22 to 04/24.

ASSISTANT: Ok, please help me with your source code for further process.

USER: My source code is PHX.

ASSISTANT: Please stand by I will get back to you.

USER: Ok, I will.

ASSISTANT: Thank you for waiting. Sorry to say no flights found with your details.

USER: No issues, thanks for the help.

ASSISTANT: Thank you for reaching us, have a nice day.