You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Emma Mitchell. I am planning to book a ticket to meet my family at PHX. Can you please help me out?

ASSISTANT: Sure, could you please share your planned dates?

USER: I am planning to travel on 05/09 and return back on 05/11.

ASSISTANT: From where you are planning to fly?

USER: My source code is SEA.

ASSISTANT: Sorry, there is no flight is available for you.

USER: That's fine. Thank you for your help.

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